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How to repair windows bootloader problems (if your computer won’t start)

Learn how to repair Windows 11 UEFI bootloader in detailed steps with the help of a handy tool in Windows.

By Lucas / Last Updated March 4, 2022

How do I repair UEFI Bootloader in Windows 11?

“I tried dual-booting Linux, and it wrecked my bootloader beyond repair. The other OS was installed fine and booted. Windows, however, refused to boot from that point. I removed that folder in hopes that it would restore the bootloader functionality. It did not. Then I looked through the startup repair logs, they said some integrity files were corrupt. But I don’t know how to repair it, please help.”

3 ways to repair Windows 11 UEFI bootloader

The corruption mentioned in the scenario is the corruption of the Windows bootloader, which usually happens while users try to install the second operating system or remove data and files on the hidden partitions.

A corrupted Windows 11 UEFI bootloader will be unable you boot your PC, thus if we’re going to repair this issue, you need to prepare a bootable media to boot your PC at first then you can follow the methods we list to fix the problem.

Method 1. UEFI boot repair via Automatic Repair

Connect your Windows 11 bootable media to your corrupted computer, enter BIOS to allow your PC to boot from this media. Then, you will see the Windows 11 installation window, please click “Repair your computer” in the left corner, then follow the guide.

How to repair windows bootloader problems (if your computer won’t start)

Then, click “Troubleshoot” > “Advanced Options” > “Automatic Repair”. Your OS will automatically run fix processes to repair Windows 11 UEFI bootloader.

How to repair windows bootloader problems (if your computer won’t start)

Method 2. Repair UEFI boot in Windows 11 via Diskpart

If the Windows automatic repair didn’t work, you can try Diskpart to fix this problem manually.

Step 1. After your computer startup from the bootable USB, click “Repair your computer”, and go to “Troubleshoot” > “Advanced Options” > “Command Prompt”.

Step 2. Please type the following orders and press “Enter” after each order.

в–Є diskpart
в–Є select disk 0
в–Є list vol

How to repair windows bootloader problems (if your computer won’t start)

In the volume list, we need to select the volume with the label “EFI”. Please type orders and hit “Enter” after each:

в–Є select volume x (“X” is the number of the volume with the EFI label)
в–Є assign letter

How to repair windows bootloader problems (if your computer won’t start)

Assign the volume an available letter like: “I” or “J” etc. And type “exit” to exit Diskpart, after that, we’ll use CMD to continue.

Step 3. Now we can fix the bootload by the following orders. Please type all orders and press “Enter” after each.

в–Є cd/d X:\EFI\Microsoft\Boot\ (“X” is the letter you assign to the EFI volume)

в–Є bootrec/fixboot

в–Є ren BCD BCD.bak

в–Є bcdboot C:\Windows /1 en-us /s x: /f ALL (Please change the content based on your own settings)

в–Є bootrec /rebuildbcd

After you finish all, you can remove the USB and restart your computer to check the problem is solved or not.

Method 3. Repair Windows 11 UEFI bootloader via a handy tool

In method 2, you can find that the repair order is “rebuildbcd”. BCD is short for “Boot Configuration Data, which is used to boot Windows. If you’re using MBR as the system disk, type “rebuildmbr” is also workable in the last bootrec order in method 2.

Using CMD is not easy for all users, especially when you need to type many pieces of complex commands. Therefore, a handy tool will be a convenient assistant to do it for you. AOMEI Partition Assistant Standard is free software to help users of Windows 11/8/7/XP/Vista to manage and protect their disks and partitions. The “Rebuild MBR” feature can avoid the risk of typing wrong commands which might damage your disk.

Warning: For UEFI boot mode, the file is at /EFI/Microsoft/Boot/BCD on the EFI system partition, thus, the third method isn’t available for users whose PC use GPT disk as the system disk.

Section 1. Create bootable media

First, we need to use AOMEI Partition Assistant to create bootable media.

Step 1. Install and run AOMEI Partition Assistant on the corrupted PC, and connect a USB drive and make sure it can be detected by Windows.

Step 2. Select “Make Bootable Media” in the left menu. In the pop-out window, choose USB Boot Device and then follow the wizard to complete.

How to repair windows bootloader problems (if your computer won’t start)

Section 2. Rebuild MBR

Step 1. Insert the bootable media to your PC and boot from the media. You need to change boot priority to the bootable media in BIOS. Then you’ll get into AOMEI Partition Assistant main interface after login.

Step 2. Right-click the disk you want to repair and select “Rebuild MBR”.

How to repair windows bootloader problems (if your computer won’t start)

Step 3. Select the type of MBR for your Windows now.

How to repair windows bootloader problems (if your computer won’t start)

Step 4. Click “Apply” and then “Proceed” to execute the pending operations.

And then, plug out the bootable media on completion and boot up your PC normally.

Bonus tips

In this post, we introduce three ways to repair Windows 11 UEFI bootloader, you can try them according to your situation. AOMEI Partition Assistant is a professional disk management tool, you can use its Professional edition to convert MBR to GPT without data loss, migrate OS to another disk, or create a Windows 11 to go USB to run your personal Windows 11 on any PC and other practical functions.

UEFI or Unified Extensible Firmware Interface is a feature of PC which works as a software interface between the operating system and the platform firmware. But this interface sometime creates annoying booting problems as problem of bootloader. This article will tell 3 ways to repair Windows 10 bootloader with ease.

1. Fix Windows 10 Bootloader with Automatic Repair

The first method to repair Windows 10 UEFI bootloader is through automatic repair. This is an in-built feature of Windows 10 disc which can help to repair EFI bootloader windows 10. To use this method, Windows setup CD/DVD or a USB is required. Follow the below mentioned instructions to fix Windows 10 bootloader through automatic repair method.

• First insert the Windows 10 installation disc or USB to the PC.

• Then restart the PC and boot it from the Windows 10 installation disc or the USB.

• When the “Install Now” screen appears on the monitor click on the “Repair your computer” option.

How to repair windows bootloader problems (if your computer won’t start)

• Then “Choose an option” screen will pop up; there select “Troubleshoot” option from the listings.

How to repair windows bootloader problems (if your computer won’t start)

• Then click on the “Automatic Repair” option.

• At the “Automatic Repair” screen the PC will ask for an account from the given list to for continuing the process.

• After selecting the desired account wait for a while until the process is completed. And hence the bootloader will be fixed.

2. Repair Windows 10 Bootloader with diskpart

Using the diskpart method is proved one of the most effective ways to deal with bootloader problems. If automatic repair doesn’t work then this one is the next thing to try. Diskpart can be also used on the first go as it is assured to be more efficient than automatic repair method.

Generally bootloader problems arise due to the fact that sometimes the UEFI partition of the PC won’t possesses an assigned drive letter. This is the most basic cause of bootloader failure. The usual solution is to assign a letter to the unassigned drives via using the diskpart utility which is present on the Windows 10 recovery disc or USB flash drive. This method also asks for the windows setup CD/DVD or USB. To fix the bootloader of Windows 10 operating system through diskpart follow these steps as mentioned below.

• Put the Windows 10 setup CD/DVD or USB in the PC. Restart the PC and boot it from the Windows 10 setup CD/DVD or USB.

• When “Install now” screen pops up select “Repair your computer” option or simply press “R” from the keyboard.

• Then select the “Troubleshoot” alternative from the listings.

How to repair windows bootloader problems (if your computer won’t start)

• Then click on the “Advance options” choice.

How to repair windows bootloader problems (if your computer won’t start)

• From the listings choose “Command Prompt” to launch it. When the command prompt window pops up then you need to type in the following commands and hit enter each time.

diskpart
DISKPART>
sel disk 0

• After getting the confirmation message “Disk 0 is now the selected disk” , type in “list vol”.

• Again press “Enter” from the keyboard. Now the diskpart will display all the list of volumes present on the PC.

• Locate the required UEFI one from the given list of volumes. The right one will have “BOOT” shown on its Label column and “System” on the Info column. The Fs column if shown then it will show FAT32 format.

• Let us suppose that the UEFI partition is present on volume 2, type in “sel vol 2” in the command prompt and press “Enter” from the keyboard.

• Then use the following command to assign a letter to the drive “assign letter =G:” do not use the letter which is already in use for other drives such as C:\ or D:\

• Now again press “Enter” from the keyboard and then stop for the confirmation message to come up on the screen as :

“Diskpart successfully assigned the drive letter or mount point.” Now type in the following commands and hit enter each time.

cd /d G:\EFI\Microsoft\Boot\

cd /d G:\Boot\ or cd /d G:\ESD\Windows\EFI\Microsoft\Boot\

Note: The letter “G” in this command may change depending on what name is used by the user to assign to the drive.

bcdboot C:\Windows /l en-us /s x: /f ALL Note: c:\ is the drive where Windows 10/8.1/8 is installed on.

How to repair windows bootloader problems (if your computer won’t start)

• The C:\ used in the command is to specify the drive where the Windows 10 is installed.

• After typing the command press “Enter” from the keyboard.

• As an alternative to the big command mentioned in the previous step use can use the below mentioned command also to reconstruct the BCD data:

• Press “Enter” from the keyboard.

• After the BCD data is built type “exit” in the command prompt to close it.

• Then restart the PC. Windows 10 should now boot normally again.

3. Repair Windows 10 UEFI/EFI Bootloader with Windows Boot Genius

The 3rd way to fix the bootloader is via using windows rescue in Windows Boot Genius.Windows Boot Genius is the software which can help the user in many booting problems. It can easily resolve the bootloader problem. User just needs to follow the below mentioned steps.

• Download Windows Boot Genius and launch it.

• Put an empty CD or USB into a workable computer. Click on “Burn” to create a bootable CD or USB.

How to repair windows bootloader problems (if your computer won’t start)

• Insert the bootable CD or USB to the problematic PC and press F12 key from the keyboard to access the Boot Menu. Select the CD or USB as the first boot device. The key may change according to the mainboard of the PC.

• After successful entry into WinPE environment, user will see the icon of Windows Boot Genius. Launch Windows Boot Genius to get into Windows Rescue mode to repair Windows 10 UEFI/EFI bootloader under the “Crash before loading” instruction.

How to repair windows bootloader problems (if your computer won’t start)

That’s all about how to repair Windows 10 UEFI/EFI Bootloader. If you don’t have much professional skills on Windows system, Windows Boot Genius may be a better choice for you.

Have problems with UEFI Bootloader? You can refer to this article and find ways to repair Windows 10 UEFI Bootloader.

By Dervish / Last Updated March 10, 2022

About UEFI Bootloader

A file with EFI file extension is an Extensible Firmware Interface file. EFI files are Bootloader executables, exist on UEFI (Unified Extensible Firmware Interface) based computer systems, and contain data on how the boot process should proceed. If UEFI Bootloader is damaged or lost, you cannot boot the computer. In this case, you should repair UEFI Bootloader.

How to repair Windows 10 UEFI Bootloader?

Before repairing UEFI Bootloader, we should first check if the Motherboard supports UEFI mode. Here is a litter trick. Right click the computer and select Manage. Then click Disk Management, and right click the disk you want to check. If the pop-up window has the option Convert to MBR, it is UEFI mode. If the Motherboard supports UEFI boot and the Bootloader has issues, you can use the following methods to repair it.

Method 1. Using Bootrec.exe

Windows has embedded with Bootrec.exe tool. It is a computer program file which can be used to repair MBR, Boot Sector, Boot Configuration Data, etc. To use Bootrec.exe, you have to enter into Windows RE. You can follow the steps below to run Windows 10 Bootloader repair.

Step 1. Insert Windows 10 installation media and boot from it. If you don’t have Windows 10 installation media, you can download Windows 10 Media Creation tool to create one.

Step 2. Press any key as instructed. Select a language, time, currency, keyboard, or input method, then click Next.

Step 3. Click Repair your computer, then select Troubleshoot.

Step 4. Choose Command Prompt in Advanced Options.

Step 5. Type bootrec.exe and hit enter, then input these commands and run one by one.

Step 6. Type exit and press Enter. Then restart the computer to see if the issue is solved.

Method 2. Using AOMEI Partition Assistant

Besides using Bootrec.exe, you can also repair Windows 10 UEFI Bootloader with AOMEI Partition Assistant. This software allows you to make a bootable USB drive and run Windows Bootloader repair without CD. The bootable USB allows you to enter into Window PE to check disk error and fix MBR.

Step 1. Download free AOMEI Partition Assistant in a running machine to make bootable USB.

Step 2. At the left column, click Make Bootable Media. Confirm the operation you are going to do and then click Next to continue.

How to repair windows bootloader problems (if your computer won’t start)

Step 3. At next page, click USB Boot Device and then click Proceed.

How to repair windows bootloader problems (if your computer won’t start)

Step 4. It will remind you the USB drive needs to be formatted and all the data on it will lose. If there are important files on it, make sure create a backup in advance.

Step 5. After making bootable USB drive, boot the computer which has UEFI Bootloader issue. It will bring you to the main interface of AOMEI Partition Assistant in Windows PE.

Step 6. Then you could use AOMEI Partition Assistant to check disk errors in the system hard drive with Disk Surface Test feature.

How to repair windows bootloader problems (if your computer won’t start)

Step 7. Also, you can use Rebuild MBR to repair Bootloader.

How to repair windows bootloader problems (if your computer won’t start)

After solving the issue, it is recommended to make a system image backup. If there is any issue happens to your computer, you can restore it to an earlier state.

In addition, AOMEI Partition Assistant has many other useful features as you can see in the picture. For example, you can create portable Windows 7/8/10 on USB drive and run it on any compatible devices with Windows To Go Creator feature. Migrate OS to SSD feature allows you to clone Operating System without reinstalling Windows.

How can you fix the problem in the old days?

Of course, you can run a reset to factory restore in Windows 10, but you need to load back all installed applications and your current working document might not have a backup and to need to do all customized settings again.

In the old days when you were using Windows 7, you could fix the problem by starting from a MS Windows Setup DVD / USB or Recovery Disc and run Command Prompt to execute bootrec command to fix the bootloader. So, you try the old ways and it does not work on Windows 10.

The question in the link below is a recent problem which I have participated to solve.

The Procedure

  1. Disable UEFI in BIOS, boot from win 10 setup DVD or USB and follow the instructions below.
  2. First, you are asked to choose your keyboard layout. Press the layout you want to use. If you want to browse through the available options, press “See more keyboard layouts” until you find the one you want to use.
  3. Choose an option of Troubleshoot.
    In the Troubleshoot screen, press Advanced options.
    In the Advanced options screen, press Startup Settings.
    You are informed that you are about to restart in order to change several Windows options, including enabling Safe Mode. Press Restart.
  4. Your computer or device restarts again and displays nine startup settings, including Safe Mode, Safe Mode with Networking and Safe Mode with Command Prompt.
    Pess the F10 key for more option and press the key for Launch Recovery Environment and click Restart.
  5. On restart, you will enter Windows Recovery Environment and select Advanced Options and select Command Prompt.
  6. In command prompt, type the lines of command below.
    bootsect /nt60 c: /force /mbr
    bootrec /fixmbr
    bootrec /fixboot
    bootrec /rebuildbcd
    Press enter after typing each line to execute.
  7. Restart computer and go to Windows Recovery Environment to run “Auto repair for startup”.

The Lesson learnt

You need to launch Windows Recovery Environment again after starting the computer is Safe mode to run the bootrec command and it is only possible to fix it when you boot from the OS, but if you do a normal boot, you cannot enter windows recovery environment.

SOURCES CONSULTED:

How to repair boot sector on disk that prevents Windows (10 and 7) from starting, whenever there is an error on the computer’s MBR

How to repair windows bootloader problems (if your computer won’t start)At least once in a lifetime it happens, one day, that the computer turns on as usual and it does not start.
It is not Windows that does not load, there is an initial problem because the boot stops immediately with an error message which, for example, can be: “Operating System not found” or “disk boot failure” or even worse, “a disk read error occurred. Press Ctrl + Alt + Del to restart”.
When the OS not found solution message appears, 90% is found and successful restore the correct startup of Windows.
The error on the disk, on the other hand, most likely depends on an internal problem on the computer hardware and does not have an easy solution (let’s talk about it another time).

When the Windows operating system does not load the error is in the boot loader or in the MBR, Namely Master Boot record which, for some obscure reason, has become corrupted.
Via the Windows utility called fixmbr, Bootrec o Bootsect, you can reset the Windows startup and restart your computer without having to reformat or pay a technician.

ALSO READ: What happens when the computer is turned on and why it can fail

MBR is a set of data that forms the first sector of a disk.
In very simple terms, it is the instruction, stored on the hard disk, that tells the computer to boot an operating system when it is turned on.
When installing multiple operating systems on a PC (e.g. Windows and Linux or Windows 7 and Windows 10) and creating a dual boot, when creating, modifying or deleting partitions on a disk, when using defragmentation programs or tools that act on the hard disk, if you are affected by viruses or malware or in the event of anomalous events, the MBR and boot loader can be damaged.
If there are errors starting the computer and no disk partitions become accessible from the operating system, the computer finds nothing to load and immediately crashes with an error message.
Luckily restore MBR and boot loader with Windows 7 and Windows 10 and correcting the errors is quite easy and within everyone’s reach.
So if you receive errors when booting Windows 7 and Windows 10, you can act as follows:

NOTE: Skip to the following article if you have to Troubleshoot “Cannot find an operating system” error on Windows 10

1) Enter the windows 7 installation dvd or the Windows 10 USB key and start the computer from the CD player or USB.
To boot the PC from CD ROM or USB, you can generally access the boot menu by pressing F12 or from the bios by changing the loading order at Boot.
Con Windows 10 e Windows 8.1 the installation DVD may also not be needed because after the computer fails to boot twice the recovery screen should appear so that you can use the commands that do the Boot Fix and MBR.

2) Go ahead when the choice of language appears.

3) Instead of clicking on “Install Windows 7”, click on the item below Repair your computer to access the Windows Recovery Options screen.

4) Press on the last line, the one where Command Prompt is written to access the black DOS interface.

5) In Windows 10, to reset the boot loader and start the PC, you have to run the following commands:

  • bootrec / fixmbr
  • bootrec / fixboot
  • bootrec / scanos
  • bootrec / RebuildBcd
  • exit

If that doesn’t work, you can try this other way with the following commands:

  • diskpart
  • salt disk 0
  • list vol

To find the EFI partition number, then type:

  • sel vol X (instead of X write the volume number of the EFI FAT32 partition)
  • assign letter=w:
  • exit

To restore the Windows 10 boot loaderFinally, type these commands:

  • cd / d W: EFIMicrosoftBoot (specify the drive letter chosen above, in this case the W)
  • bootrec / fixboot
  • ren BCD BCD.bak
  • bcdboot C:Windows /l it-it /s w: /f ALL

ALSO READ: Stop the Windows 10 automatic recovery loop

In Windows 7 the commands for Fix MBR I’m:

  • bootrec / RebuildBcd
  • bootrec / fixmbr
  • exit

If that doesn’t work, go back to the command prompt and run the command too:
bootsect / nt60 c: / MBR
or
bootsect /nt60 SYS
To automatically restore the boot from partition C.

If the bootsect command is not found, navigate to the Windows 7 DVD directory.
From the starting position, X: Sources, write D: and press enter; then write Dir to verify that it is the DVD or if it is another partition.
If there are more disks and more partitions, search for the DVD directory by going in alphabetical order, thus writing E:, F: and so on.
If the DVD is in D :, write cd boot – Enter, run the command bootsect as seen before.
While bootrec.exe / fixmbr allows you to restore the master boot record and repair the computer boot process, command bootrec.exe / fixboot rewrites a new boot record on the partition while bootrec.exe / rebuildbcd rebuilds the Boot Configuration Data.

6) Close the command prompt and restart your computer without cd in.

Then there are some small ones programs that allow advanced MBR management and bootloader recovery:

1) Hiren CD se il pc non si avvia allows you to load all the utilities to restore the boot loader and fix the MBR.
HIren CD is started when the computer is turned on by changing the boot order at boot.

2) Super grub is the program to use if the PC no longer starts, an ISO to burn to CD.
Boot your PC from CD and then use SuperGrub to repair the damaged bootloader.

3) MBR Wizard allows you to save the MBR and restore it in case it gets damaged.
For the backup, the command is issued: MBRWiz / save = MBR / filename = D: backupMBR
For the restore instead: MBRWiz / restore = MBR / filename = D: backupMBR

4) MBRFix is a command line tool for Windows that can be used to launch advanced commands that manipulate the MBR.

5) BOOTICE is a very complete portable program that allows you to restore the MBR of both the internal hard disk and an external hard disk or a USB stick, to backup the first sector of the disk, to modify the BCD file (Boot Configuration Data) , create disk images, and install different types of MBRs.

6) HDHacker is perhaps the easiest on the list to backup and restore any sector of a partition, including the MBR sector.

If the system still does not boot, save everything if Windows does not start and the computer does not turn on.

Chris Hoffman is Editor-in-Chief of How-To Geek. He’s written about technology for over a decade and was a PCWorld columnist for two years. Chris has written for The New York Times and Reader’s Digest, been interviewed as a technology expert on TV stations like Miami’s NBC 6, and had his work covered by news outlets like the BBC. Since 2011, Chris has written over 2,000 articles that have been read nearly one billion times—and that’s just here at How-To Geek. Read more.

How to repair windows bootloader problems (if your computer won’t start)

You turn on your computer one day and Windows refuses to boot—what do you do? “Windows won’t boot” is a common symptom with a variety of causes, so you’ll need to perform some troubleshooting.

Modern versions of Windows are better at recovering from this sort of thing. Where Windows XP might have stopped in its tracks when faced with this problem, modern versions of Windows will try to automatically run Startup Repair.

First Things First: Has Anything Changed?

Be sure to think about changes you’ve made recently—did you recently install a new hardware driver, connect a new hardware component to your computer, or open your computer’s case and do something? It’s possible the hardware driver is buggy, the new hardware is incompatible, or that you accidentally unplugged something while working inside your computer.

If the Computer Won’t Power On At All

How to repair windows bootloader problems (if your computer won’t start)

If your computer won’t power on at all, ensure it’s plugged into a power outlet and that the power connector isn’t loose. If it’s a desktop PC, ensure the power switch on the back of its case—on the power supply—is set to the On position. If it still won’t power on at all, it’s possible you disconnected a power cable inside its case. If you haven’t been messing around inside the case, it’s possible the power supply is dead. In this case, you’ll have to get your computer’s hardware fixed or get a new computer.

Be sure to check your computer monitor—if your computer seems to power on but your screen stays black, ensure your monitor is powered on and that the cable connecting it to your computer’s case is plugged in securely at both ends.

The Computer Powers On And Says No Bootable Device

If your computer is powering on but you get a black screen that says something like “no bootable device” or another sort of “disk error” message, your computer can’t seem to boot from the hard drive that Windows was installed on. Enter your computer’s BIOS or UEFI firmware setup screen and check its boot order setting, ensuring that it’s set to boot from the correct hard drive.

If the hard drive doesn’t appear in the list at all, it’s possible your hard drive has failed and can no longer be booted from.

If everything looks fine in the BIOS, you may want to insert Windows installation or recovery media and run the Startup Repair operation. This will attempt to make Windows bootable again. For example, if something overwrote your Windows drive’s boot sector, this will repair the boot sector. If the recovery environment won’t load or doesn’t see your hard drive, you likely have a hardware problem. Be sure to check your BIOS or UEFI’s boot order first if the recovery environment won’t load.

You can also attempt to manually fix Windows bootloader problems using the fixmbr and fixboot commands. Modern versions of Windows should be able to fix this problem for you with the Startup Repair wizard, so you shouldn’t actually have to run these commands yourself.

If Windows Freezes or Crashes During Boot

How to repair windows bootloader problems (if your computer won’t start)

If Windows seems to start booting but fails partway through, you may be facing either a software or hardware problem. If it’s a software problem, you may be able to fix it by performing a Startup Repair operation. If you can’t do this from the boot menu, insert a Windows installation disc or recovery disk and use the startup repair tool from there. If this doesn’t help at all, you may want to reinstall Windows or perform a Refresh or Reset on Windows 8 or 10.

If the computer encounters errors while attempting to perform startup repair or reinstall Windows, or the reinstall process works properly and you encounter the same errors afterwards, you likely have a hardware problem.

If Windows Starts and Blue Screens or Freezes

How to repair windows bootloader problems (if your computer won’t start)

If Windows crashes or blue screens on you every time it boots, you may be facing a hardware or software problem. For example, malware or a buggy driver may be loading at boot and causing the crash, or your computer’s hardware may be malfunctioning.

To test this, boot your Windows computer in safe mode. In safe mode, Windows won’t load typical hardware drivers or any software that starts automatically at startup. If the computer is stable in safe mode, try uninstalling any recently installed hardware drivers, performing a system restore, and scanning for malware. If you’re lucky, one of these steps may fix your software problem and allow you to boot Windows normally.

If your problem isn’t fixed, try reinstalling Windows or performing a Refresh or Reset on Windows 8 or 10. This will reset your computer back to its clean, factory-default state. If you’re still experiencing crashes, your computer likely has a hardware problem.

How to Recover Files When Windows Won’t Boot

How to repair windows bootloader problems (if your computer won’t start)

If you have important files that will be lost and want to back them up before reinstalling Windows, you can use a Windows installer disc or Linux live media to recover the files. These run entirely from a CD, DVD, or USB drive and allow you to copy your files to another external media, such as another USB stick or an external hard drive.

If you’re incapable of booting a Windows installer disc or Linux live CD, you may need to go into your BIOS or UEFI and change the boot order setting.

If even this doesn’t work—or if you can boot from the devices and your computer freezes or you can’t access your hard drive—you likely have a hardware problem. You can try pulling the computer’s hard drive, inserting it into another computer, and recovering your files that way.

Following these steps should fix the vast majority of Windows boot issues—at least the ones that are actually fixable. The dark cloud that always hangs over such issues is the possibility that the hard drive or another component in the computer may be failing.

Few PC problems are as frustrating as seeing yourself in the position that your Windows PC wo n’t boot . When the system is not even able to start, it is difficult to locate the source of the problem in order to solve it, so in this article we are going to tell you what you can do if your PC is not able to start Windows .

The problems that can lead to a Windows PC not booting can be many and very different: from an Overclock problem until the hard drive has passed into a better life. In those cases it is usually easy to detect, especially if you have been “touching” something (if you were trying to overclock and the system does not start, then it surely has to do with it), but the problem comes when the PC does not start suddenly and apparently not having touched anything .

How to repair windows bootloader problems (if your computer won’t start)

Start Windows in safe mode

The most obvious solution when Windows doesn’t start is to go into safe mode. It is an alternative boot scheme that starts the PC with the minimum necessary software to avoid possible errors. The most bizarre thing about this is that there are times when just starting Windows in safe mode once and restarting, it already starts normally. Windows stuff.

Safe mode with recovery mode

When the computer makes three unsuccessful attempts to start, it will automatically enter safe mode through the Windows recovery process. You can force this mode by pressing the reset button on your PC in three consecutive boot attempts. Once you enter recovery mode, choose “Troubleshoot”, then “Advanced Options” and finally “Start Repair.”

In many cases, this system will detect problems and fix them automatically. If not, you can also select “Startup Settings” and from there launch Safe Mode.

Safe mode with an installation disc

If you have a Windows 10 installation disc (or USB pen drive), you can also access recovery mode by starting the PC from the device. It will give you the option to reinstall Windows, but you can also go to advanced options, accessing the same recovery menu that we have seen before. From here you also have the option to select the “Recovery Manager”, which will also detect problems and try to solve them.

Disable Fast Boot in BIOS

There is an option within the BIOS or UEFI on most modern PCs called Fast Boot that allows Windows (from version 8, not just Windows 10 anymore) to start faster by preloading the drivers. Unfortunately, Windows updates can cause this option to cause problems loading outdated drivers.

So, if your Windows PC does not start especially after installing operating system updates, it is worth going into the BIOS and deactivating this setting, as it will often solve the problem. If after doing so the system starts up, you can go back to the BIOS and activate it because it will have loaded the updated drivers.

Disconnect all USB devices

Going back to the topic of drivers, although it seems absurd sometimes Windows does not start because it is detecting a USB device that it is not capable of loading the drivers, so it is worth trying to disconnect all the USB peripherals you have connected (including keyboard and mouse ) and try to turn on the PC as well.

Reassign drive letters

Sometimes, and especially again after installing Windows updates, the problem is that the disk drive mappings have been misconfigured. This usually only happens when you have multiple hard drives installed on the PC, so if this is not the case you can skip this part.

To solve it, you will have to enter the recovery mode as indicated above, but you must select the option to access the command prompt or command prompt. Once the window is open, you should run diskpart just by typing it.

Once this is done, run the command ” list volume” to see what drives you have in the system and what letters they have assigned.

If you see that something is wrong, from here you can select it with “select volume X” where X is the volume number, and “assign letter X” to assign the corresponding drive letter, where X is logically the lyrics.

Avoid the new Windows 10 Bootloader

If none of the above has worked, an update may have installed the new Windows 10 Bootloader, which sometimes gives problems again when there are multiple disk drives on the PC. Fortunately it is easy to use the previous version again, and for this you have to go back to the loaded command console through the recovery mode and enter the following command:

Restart the PC and you will see that the Windows 10 start interface has changed to a much more “archaic” one, but it gives fewer compatibility problems.

Repair or reinstall Windows

If none of the above has worked for you and Windows still won’t boot, then you may have to reinstall or repair the operating system. To do this you must access the recovery mode again and, in this case, select the corresponding option. You can restore system (sometimes it is especially useful if the problem comes after installing updates), go back to the previous version or reinstall the system.

Always Get Windows Boot Manager Screen at Startup and Windows Fails to Start?

Hello, recently the “Windows boot manager” screen always pop out during booting up afterВ adding a new hard disk drive to a Windows xp/7/8/10/vista computer? Always get the boot manager problems on startup after upgrading Windows computer operating system? Or how to start computer without boot manager at startup for Windows PC?

OK! No rush! Restart your Windows computer into BIOS and reset it there to take chances. If it also does not remove bootВ manager from your Windows startup, also read more details here to go on.

More Ways to Fix/Remove/Disable Windows Boot Manager Issues

You can use the below ways to fix/remove/disable Windows boot manger problems for your Window computer:

Firstly, open cmd with the following method: pressing Windows icon + R on keyboard, or launching it from start -> run, and then type ‘cmd’How to repair windows bootloader problems (if your computer won’t start)

1). bootrec /fixmbrHow to repair windows bootloader problems (if your computer won’t start)

  • Bootrec /fixmbr
  • Bootrec /fixboot
  • bcdedit /export c: \bcdbackup
  • attrib c: \boot\bcd -h -r -s

2). bootrec /fixboot (This one is included in the first solution)How to repair windows bootloader problems (if your computer won’t start)

3). Correct BIOS boot item order
When you do set no bootable hard drive or device as the first boot item in BIOS interface, the PC will find no bootable partition/device and cannot boot up. So, enter computer BIOS interface and reset the boot order according your needs.
Just click F2 or Del button quickly after opening your PC till the computer comes to BIOS Setup Utility screen. And then, open Advanced BIOS Features to set the right storage device as the top boot item there.

Recommend: Read this page to reset BIOS boot order

4). Boot up computer from external bootable usb hdd/stick/CD/DVD
If the previous way cannot help you out, it must not be caused by BIOS problems. And, then, go boot up computer from external bootable USB hdd/stick/CD/DVD/floppy as you wish to fix the computer problems. How to repair windows bootloader problems (if your computer won’t start)
==>> For more details to make an external hard disk/usb drive/CD/DVD bootable, read this page: How to create a bootable external drive

5). Download and use new good hard drive BCD or MBR files

When computer internal hard drive BCD/MBR files are lost or corrupted, try to download and use new good ones to take chances.

6). Perform a system restore.

  1. Restart your computer and boot from the Windows installation disk.
  2. Choose to change language & other settings in Windows Setup or not; then, clickВ Next.
  3. ClickВ Repair your computer.
  4. SelectВ TroubleshootВ >В Advanced optionsВSystem Restore.
  5. Choose the target operating system.
  6. ClickВ NextВ in the System Restore wizard.
  7. Select the proper restore point and clickВ Next.
  8. Confirm your selection and clickВ Finish.
  9. ClickВ YesВ in the prompt window to confirm system restore.
  10. Wait for the restore to complete.
  11. Restart your PC.

How to repair windows bootloader problems (if your computer won’t start)

How to repair windows bootloader problems (if your computer won’t start)

7). Update or reinstall computer operating system.

Also update or reinstall computer operating system in case that such Windows boot manager problems are aroused by corrupted/deleted operating system problems.
Of course, no matter what happens, always download and use safe OS version from authorized sites or locations in case of virus attack.

8). Change damaged hard drive

Of course, also change damaged hard drive after testing it with CHKDSK or diagnostic tools and finding it is corrupted seriously. But, if internal hard drive does not fail completely, also learn to recover hard drive files and format corrupted hard drive to take chances.

Download free hard drive file recovery software iCare Recovery Pro to recover data from computer when failed to boot.

Why Windows Boot Manager Not Responding During Booting Up?

Generally, Windows 7/8/10 PC often will give boot manager problems and asks you choose boot storage devices or operating system versions over and over again, before you find right reasons behind and solutions to fix computer problems. Hence, the top priority thing for you now to disable such Windows boot manager issues is to find the causes behind:

1). Computer hard drive BCD or MBR files deleted/lost/corrupted

Generally speaking, the related Windows boot manager problems often indicates there are some computer booting issues. For example, when your computer hard drive Boot Configuration Data (BCD) which often plays a very important role to ensure the Windows PC will start up smoothlyВ is deleted/lost/corrupted, the PC will finally and surely not be able to boot up. And, the hard drive MBR (Main Boot Record) also put a similar impact on computer starting. So, go check your bootable hard drive, especially the hard drive partition with bootable OS loading carefully.

==>> If you want to know more details about deleted file recovery, go visit this: How to recover deleted files in Windows

2). Computer BIOS boot order is incorrectly set

You do have Added a new hard drive to PC or extended computer memory with a second/third hard drive before you encounter computer boot manger screen issues there? OK! Have you also reset the PC BIOS boot order correctly? If not, you will also get the same problems reasonably.

3). Computer operating system gets corrupted

You are also facing such Windows boot manager screen problems after you do have upgrading/updating computer Windows 8/7/xp/10 operating systems? All right! When your computer operating system is deleted, lost or corrupted after OS upgrading/updating, you are also possible to be stuck in such boot manager problems at startup.

4). Computer hard disk drive corrupted

And, if your computer hard disk drive is corrupted, or loosely connected, the same Windows startup boot manger problems also come to you.
And, now, no matter whether you do have found the causes behind, also go on reading the methods below to disable computer boot manager on startup screen.

How to repair windows bootloader problems (if your computer won’t start)

A nasty new form of ransomware is wreaking havoc on computers. Hackers that encrypt your files and demand money from you in the form of bitcoin is bad enough, but a few versions also overwrite your Windows PC’s master boot record (MBR).

The master boot record is a key part of your PC’s startup system. It contains information about the computer’s disk partitions and helps load the operating system. Without a properly functioning MBR, your PC simply won’t work.

Ransomware that overwrites the MBR isn’t all that new, with examples of it dating back to at least 2012. More recently, the Petya variant of ransomware has been causing MBR problems. Then in August, a pesky bit of malware popped up on FossHub that overwrote the MBR, which caused headaches for affected users. And the master boot record can sometimes be damaged via less hostile actions, as well.

Luckily, destroying the MBR usually isn’t irreversible. But it’s still problematic since overwriting the MBR renders your PC inoperative until it’s repaired. On top of that, the method for fixing it is far from obvious.

Here’s how to make everything right if your master boot record was erased.

How to fix the MBR

The main way to fix the MBR is to use a command prompt and run the bootrec.exe command. In versions of Windows prior to Windows 8 and 10, you usually accessed the command prompt through recovery media like a DVD disc or USB drive. That still works in Windows 10, and we’ll discuss that method at the end of this tutorial. But the latest versions of Windows offer an easier method for running recovery commands without external media.

How to repair windows bootloader problems (if your computer won’t start)

When you first boot up a Windows 10 PC it should recognize that there’s a problem and enter “automatic repair” mode. When it does, you’ll see the words “Preparing Automatic Repair” appear below the blue Windows logo.

If that doesn’t happen, but you do see the blue Windows logo, turn off your computer using the hard reset/power button. Keep turning the computer on and off until you see your PC booting into automatic repair. It should only take a few reboots.

How to repair windows bootloader problems (if your computer won’t start)

Once automatic repair mode is ready, you’ll see the Automatic Repair screen. From here select Advanced options .

How to repair windows bootloader problems (if your computer won’t start)

On the next screen, click Troubleshoot and then Advanced options once again.

How to repair windows bootloader problems (if your computer won’t start)

You’ll see a screen with six options. If you want, you can select Startup Repair before turning to the command prompt and Bootrec. Startup Repair is an automated program that will try to fix any problems it finds on the computer disk without any intervention from the user.

It’s a good utility that may fix your problem, but Startup Repair will take far more time to complete its task than simply running Bootrec.

To use the Bootrec option, click the Command Prompt tile. This may prompt your computer to reboot yet again and then ask you to login with your password. If that happens, do so.

Once the command line appears, all you have to do is type the following, then press Enter:

Note the space between “exe” and “/fixmbr”—it’s critical to include this space for the command to run properly. The first part tells the PC to run the Bootrec program, while the “/fixmbr” option tells Bootrec exactly what we want it to recover.

How to repair windows bootloader problems (if your computer won’t start)

If all goes well, the command prompt should print out, “The operation completed successfully.” When you see that you can reboot your PC.

If you’re trying to recover from ransomware or some other form of malware, be sure to boot into Safe Mode and then run an antimalware program. For more details on these steps, check out our earlier tutorials on how to remove malware from a Windows PC and how to boot into Safe Mode in Windows 10.

Bootrec from a system repair drive

If you’re running an older version of Windows, or if your Windows 10 PC isn’t launching the repair options, you’ll need to use a recovery drive to fix your MBR. Start by inserting the system repair media into the PC. This will be either one you created, or a purchased version of the Windows install discs.

How to repair windows bootloader problems (if your computer won’t start)

Creating a recovery drive for Windows will give you peace of mind in case the worst happens.

Next, boot your system. If you’re using a USB drive, your system’s BIOS needs to be set to boot from USB before falling back to any internal drives. If you don’t have your BIOS correctly configured, the system recovery drive will be of no use. Adding to the complication, the way you enter the BIOS (and how you set it up) is not universal. Lincoln Spector has a tutorial on how to handle setting up your BIOS to boot from USB.

Once you’ve booted into the recovery drive, you should be asked to select a keyboard layout in your language—US English in this case. Next, you’ll land on the troubleshooting screen we saw earlier.

At this point you can continue to the command prompt as we discussed earlier and run Bootrec.

If you’re on Windows 7, you’ll need to follow slightly different steps once you launch into the recovery mode. After you’ve selected the input method, select Repair your computer, followed by the operating system name. Then click Next > System Recovery Options > Command Prompt and start Bootrec using the same bootrec.exe /fixmbr as above.

Next steps

Although the MBR problem is relatively easy to repair, it’s still best to be prepared for the worst in case this problem ever strikes again.

How to repair windows bootloader problems (if your computer won’t start)

The most important thing you can do to protect against MBR erasure and most other catastrophic PC malfunctions: Back up your personal files. That means keeping a local daily backup on an external hard drive or using a third-party program for daily backups. It’s also a good idea to have a secondary backup that lives offsite, such as an online backup service like Backblaze, Carbon, or CrashPlan. PCWorld’s guide to backing up your PC for free can help you out.

You’ll also want to create a system recovery drive. This is an especially important measure in the age of Windows 10, since many early Windows 10 users upgraded to the new operating system via a digital download—and thus don’t have a physical copy of the operating system. If the automatic repair method ever fails, you’ll need a system repair drive in order to use Bootrec or any other system recovery tools.

Check out our earlier tutorial to learn how to create a system recovery drive, and the important information Microsoft won’t tell you about recovery drives.

This post all talks about how to repair Windows 10/11 using the command prompt.

How to repair windows bootloader problems (if your computer won’t start)

David Darlington

Apr 20, 2022 • Filed to: Windows Computer Solutions • Proven solutions

With the rising popularity of Windows 10/11, most computers are installed Windows 10/11 OS. Windows 10/11 possesses excellent stability, but in some cases, you may still encounter various Windows errors like failure to boot, blue screen issues, even crashing. For this kind of instance, we have to repair it. Fortunately, Windows provides a command-line tool to help you to solve all kinds of system issues. By following the below steps, you can learn how to repair Windows 10/11 using Command Prompt.

  • Part 1. How to Repair Windows 10/11 using Command Prompt
  • Part 2. How to Repair and Recover Windows 10/11 with Bootable Media

Part 1. How to Repair Windows 10/11 using Command Prompt

Windows 10/11 provides a very useful command-line tool to help you repair your system.В We just need to enter the recovery mode of the system. In most cases, we can enter the recovery mode with just simple steps when you are not able to boot your computer in the usual manner.В You can follow the steps below to enter the recovery mode of Windows 10/11.

Step 1. Enter Windows Recovery mode

If you can still access Windows 10/11, open the Settings app and select Update & SecurityВ >В RecoveryВ >В Advanced startup. Then click Restart now button. The computer will boot into Windows Recovery mode automatically.

How to repair windows bootloader problems (if your computer won’t start)

However, you can’t enter Windows as normal. Follow the below steps:

Shut down your computer first and then power it on. Then press the F11 key shortly. If it might not work, hold and press on the power switch to force shutdown when it starts loading Windows 10/11. Next, repeat this operation 3-4 times until seeing the Recovery mode screen. Then select Troubleshoot > Advanced options > Command Prompt.

How to repair windows bootloader problems (if your computer won’t start)

Step 2. Using Command Prompt to repair Windows 10/11

Once you launch the Command Prompt tool, enter the following command:

How to repair windows bootloader problems (if your computer won’t start)

The program will automatically fix errors in Windows 10/11. However, it will taker a few minutes to repair it. Just wait for it completes. After completing the operation, you can restart your system in the normal mode. If everything goes well, it will fix any issue with Windows 10/11.

By following these steps, you would be able to learn how to repair Windows 10/11 using Command Prompt. Though, if you can’t access your important data files due to a malfunctioning system, then you can follow the next tutorial.

Part 2. How to Repair and Recover Windows 10/11 with Bootable Media

We are sure that by following the above-mentioned solution, you would be able to learn how to repair Windows 10/11 using Command Prompt. If your system is working flawlessly, then you don’t have to worry a bit. Nevertheless, if you can’t restart your system or access your important content, then you might need to take some added measures for operating system crash recovery. By using Recoverit Data Recovery Software, you can easily recover your lost or inaccessible content pretty easily. Here are some of its major features.

How to repair windows bootloader problems (if your computer won’t start)

When you cannot access the Windows 10/11 PC, you can free download Recoverit Data Recovery Software to create bootable media and recover data from hard disk.

How to repair windows bootloader problems (if your computer won’t start)

One of the worst computer issues that you can ever encounter is a computer that refuses to boot. When you can’t even get your computer to post it is very difficult to pinpoint the cause of the problem.

However, don’t lose hope yet. Even if your computer seems to be hopeless there are still a couple of things that you can do to try and fix this kind of issue. Luckily, Windows 10 packs several features that can help you in solving boot issues on your computer.

Today, we are going to show you a few methods that you can do to try and fix Windows 10 that won’t boot up.

Let’s get started.

How to repair windows bootloader problems (if your computer won’t start)

Why Won’t Windows 10 Boot?

There are a lot of possible reasons why Windows 10 fails to load on your computer. When you are having a hard time making Windows 10 to boot on your device, it may be related to a hardware issue like your hard drive, motherboard, or even your graphics card.

It is also possible that the issue is caused by improper software configurations, improperly installed applications, malware, and corrupted system files and drivers.

Now, to make it easier for you, we’ve come up with a list of possible fixes that you can follow to try and fix the issue on Windows 10 that won’t boot. Moreover, you can know more solutions on this page.

Method 1: Perform a Startup Repair.

Windows has a built-in tool that you can use that effectively repairs any issue that prevents Windows 10 from booting up properly. Startup Repair scans your system for improper settings and corrupted system files and automatically try to repair them.

To use startup repair on Windows, you can follow the steps below.

1. To access Recovery Mode on Windows 10, turn your computer on and off for at least three times without letting it get past the BIOS menu.

2. After that, click on Advanced Options. How to repair windows bootloader problems (if your computer won’t start)

3. Next, click Troubleshoot and select Advanced Options again.

4. Lastly, click on Startup Repair and Windows will automatically attempt to fix any problems that cause it not to boot properly.

How to repair windows bootloader problems (if your computer won’t start)

After that, restart your computer normally to see if Windows will boot up successfully on your computer.

Method 2: Repair Master Boot Record.

If startup repair did not work to fix the issue on Windows 10 that won’t boot, you can also try repairing the MBR or Master Boot Record on your computer’s hard drive. It is possible that the MBR got corrupted which causes the booting problem on Windows 10.

To fix this, you can try following the steps below.

1. On your computer, follow the steps above to access recovery mode once again.

2. After that, click on Advanced Options and select Command Prompt.

How to repair windows bootloader problems (if your computer won’t start)

3. Next, inside the Command Prompt type bootrec /fixmbr and hit Enter.

4. Lastly, after repairing the MBR type bootrec /fixboot and hit Enter.

How to repair windows bootloader problems (if your computer won’t start)

Now, after repairing the MBR on your computer, restart it normally to check if the booting issue on Windows 10 is already fixed.

Method 3: Unplug All USB Devices.

Another thing that you can do if your computer won’t boot Windows 10 is to remove all USB devices connected to it. There was an issue with the recent Windows 10 update where it won’t boot when it comes across a conflict with one of the USB devices.

Try to unplug all USB devices then, start your computer normally to see if it will boot up. Now, restart your computer once again and plug in your USB devices one by one to identify which of it causes the problem.

After that, we recommend that you install the proper drivers for your USB device or replace it as it can be a sign that it is failing.

Method 4: Turn off Fast Boot on Your BIOS.

Motherboards today support fast to boot which allows Windows 8 and 10 to boot faster on your computer since it has larger system files compared to Windows 7. However, this can cause issues as you force the operating system to load faster and it may not properly initialize all the files needed to start Windows.

To turn off fast boot, check out the steps below.

  1. Start your computer then, press on the DEL key on your keyboard until the BIOS settings appear.
  2. After that, navigate to the Advanced tab on your BIOS settings.
  3. Lastly, make sure that Fast Boot on your motherboard is disabled.

How to repair windows bootloader problems (if your computer won’t start)

Now, exit and save the changes in your BIOS settings, then restart your computer normally to check if the Windows 10 won’t boot problem on your computer is resolved.

However, if you are still having problems starting Windows on your computer. You can proceed to the next method below to try and fix the issue.

Method 5: Change the Boot Device.

Another reason for Windows not being able to boot on your computer is that your BIOS settings are not configured properly. It is possible that the boot priority option on your BIOS is not set to your hard drive. In this case, your motherboard tries to find the operating system on another device instead of your hard drive.

To fix this, follow the guide below.

  1. Just like above, press on the DEL key on your keyboard while your computer is starting to launch the BIOS settings.
  2. After that, go to the Boot tab on BIOS.
  3. Lastly, use the + and – key on your keyboard to adjust the location of your hard drive and make sure that it is at the top.

How to repair windows bootloader problems (if your computer won’t start)

After changing the boot device on your BIOS, save the changes and start your computer normally to see if it will continue booting Windows 10.

This sums up our guide on how to fix Windows 10 won’t boot on your computer. We hope that this guide helped you in fixing the boot issues and we would highly appreciate it if you can share it with your friends on social media.

by Jenefey Aaron Updated on 2020-04-16 / Update for Fix Windows

Get to Know What Boot Manager Is

Officially, Windows Boot Manager (BOOTMGR) is a small piece of software, called a boot manager. BOOTMGR is used to start your Windows 10, Windows 8, Windows 7, or Windows Vista operating system startup. You can select which operating system you would like the Windows to boot in the Boot menu. And also you can set the default boot entry so that the operating system will load what you prefer automatically.

“BOOTMGR is missing” is one of the common startup errors in Windows. Sometimes it displays “Couldn’t find BOOTMGR”, shortly after the computer is turned on. The possible reasons for BOOTMGR errors include corrupt and misconfigured files, hard drive and operating system upgrade issues, and outdated BIOS, damaged or loose hard drive interface cables, or your PC is trying to boot from a hard drive or flash drive that is not properly configured to be booted from.

Sometimes a simple Windows restart can fix the boot manager issues. Nevertheless, if this does not do the trick, a professional Windows boot fix tool is a good choice. Windows Boot Genius is the first PC utility aiming to diagnose and troubleshoot Windows boot manager problems and other Windows won’t boot issues like booting failure, crash, freeze, black screen of death, or blue screen of death.

Part 1: How to Change Default Operating System to Run at Startup (Boot Manager) in Windows 10

When you dual-boot Windows 10 with an earlier versions of Windows like Windows 8.1, then you have 30 seconds to choose an operating system you wish to boot in before the default operating system runs automatically.

If you want to change the default boot and other boot options, just click Change defaults or choose other options to flip to Options window. Here you can change the timer, choose a default operating system to boot into and choose other operations.

Part 2: How to Use Windows Boot Genius to Fix Windows Boot Manager Errors and Other Windows Boot Issues

Windows Boot Genius is a comprehensive Windows tool with 4 built-in utilities:

  • Windows Rescue: Repair any booting problems on Windows 10/8.1/8/7/XP/Vista.
  • Password & Key Recovery: Reset or remove Windows login password (Microsoft account password).
  • Data Recovery: Retrieve data from internal/external disk due to accidental deletion, disk damage or formatting.
  • Disk Tools: Backup or restore disk or partition, partition managing and data wipe.

Following are instructions to fix Windows 10 BOOTMGR is missing error and other Windows boot issues.

Before start, please download and install Windows Boot Genius to a workable computer.

Firstly you need to create a bootable CD/DVD or USB flash drive. Insert a CD/DVD to CD-ROM drive on PC or connect a USB flash drive to computer. This software is integrated with an ISO file so that you can burn it to the CD/DVD/USB.

Insert the burned bootable disk to the Windows 10 that you won’t boot successfully, and set BIOS (UEFI) to boot computer from CD/DVD/USB.

On Windows 10, just follow the steps below to enter BIOS (UEFI) setup.

  • Click Start menu and select Settings.
  • Choose Update and Security option>Recovery
  • Click Restart now under Advanced startup
  • Select Troubleshoot option
  • Select UEFI Firmware Settings
  • Click Restart to boot the computer in to UEFI (BIOS) screen.
  • Once the computer boots from bootable disk successfully, you can see main interface of Windows Boot Genius. In Windows Rescue tab, there are Solution Center and Function Center.
  • If you are a newbie to Windows operating system and do not know the cause of the booting issue. In Solution Center it lists the manifestation of frequently encountered boot problems. Select one that suits your situation, you can follow the detailed instructions display on the right part within the program.

    For advanced users, if you know what exactly caused the issue, just go to Function Center and choose corresponding tools to fix the problem.

    With Windows Boot Genius, simply designed and with onscreen tips, you can handle any PC boot issues even you are a green hand.

    In this article, we get to know what Windows Boot Manager is and how to do when BOOTMGR is missing. Windows Boot Genius is a versatile Windows rescue toolkit that you’ll ever need.

    Updated on 2020-04-16 / Update for Fix Windows

    Why Windows 7 Won’t Boot?

    Reason 1: Poor Connection

    Computer won’t start if there’s something wrong with computer power cord such as faulty connection, loose plugs and so on. Besides, power failure or damaged power button can also cause this problem. Please refer to Solution 1 to check the power supply, power button and power cord.

    Reason 2: Hardware Failure

    Hardware failure is one of the reasons that may cause the startup problem. Usually, this could be caused by the motherboard, graphics card and computer memory which could have something wrong. Please refer to Solution 2 to check the hardware.

    Reason 3: External Device

    If your computer connects to external devices which could probably have something wrong, Windows 7 will probably not boot normally. Please refer to Solution 3 to remove all external devices from your PC.

    Reason 4: Damaged MBR/DBR

    Computer reads the boot loader code from MBR/DBR when it boots. If the boot loader code is damaged, it may cause the black screen problem and the PC will not boot normally. Please refer to Solution 4 to fix MBR/DBR.

    Windows 7 Won’t Boot? How to Fix?

    Solution 1: Check the Power Supply, Power Button and Power Cord

    Solution 2: Check Monitor, Motherboard, Graphics Card and Computer Memory

    Firstly, check all internal connections and see if they are loose or damaged. Next, take off the computer memory and graphics card and then clean them. Or you could try to replace the computer memory and graphics cards with new ones. Then you will know whether the original one works or not.

    Next, check the motherboard. Check all connections and remove dust. If there’s something wrong with the motherboard, it would be better to fix it with professional.

    Please go on to Solution 3 if the above ways still cannot troubleshoot your PC’s problem. It’s suggested to ask a professional computer technician to repair it if you don’t know how to deal with it.

    Solution 3: Remove External Devices

    Solution 4: Use System Rescue Tool Renee PassNow to Restore MBR/DBR

    More about Renee Passnow

    Whole password reset process takes only 4 simple steps without damaging data inside! Do not require any professional knowledge or possible password combinations.

    For local account and administrator , Renee Passsnow will remove the password directly.

    For Microsoft account, Renee Passnow will turn the Microsoft account into local one and reserve all data inside the account.

    Renee Passnow can help to recover data or transfer data inside the disk without running Windows.

    Compatible with: Windows 10, 8.1, 8, 7, Vista, XP.

    Here are detailed steps on how to reset login password with Renee PassNow.

    Step 1: Download and install Renee PassNow in any workable Windows computer.

    Step 2: Choose creation method, USB or CD/DVD.

    Step 3: Boot the target PC from the created password reset USB/CD/DVD.

    You will boot the target computer via a new created reset disk. Firstly, please hold a hot key to enter the BIOS menu and put CD-ROM or Removable Devices as the first choice. Please click here to know about how to change the boot order of your computer. After changing it successfully, please remember to save your setting and then restart your PC.

    Step 4: Select “Windows Recovery”.

    Step 5: Select “Fix CHS Parameters in MBR” then choose the disk and click “Fix MBR”. After fixing, please restart your computer.

    Also read in:

    • 日本語
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    use Google Translate

    Operating Systems:

    Last update: 04-09-2019

    You can restore Windows Boot Loader manually using Windows utilities

    Introduction

    Should you need to restore Windows Boot Loader, proceed as described in this article.

    One of the symptoms when you need to do this, is when you have the BOOTMGR is missing error on an attempt to start Windows.

    Solution

    Windows 2000/XP/Server 2003 Installation CD

    Boot the computer from the installation CD, start Recovery Console and run fixmbr and fixboot commands.

    Further information is available at:

    (!) If the system partition was not restored to its original position, then the boot.ini file needs to be updated.

    This can be done with the Recovery Console command bootcfg /rebuild

    Further information is available at:

    Windows Vista or Windows 7 installation CD/DVD

    Boot from Windows Vista installation disc, select language and keyboard or input method, click Next and choose to Repair your computer. Then you will need to select the operating system that you want to repair. In the System Recovery Options dialog box click Command Prompt and type the following:

    Bootrec.exe /FixMbr
    Bootrec.exe /FixBoot

    If you want to completely rebuild Windows Vista Boot Configuration Data, then you should issue the following command:

    This command scans all disks for installations that are compatible with Windows Vista. Additionally, this option also allows select the installations that you want to add to the Boot Configuration Data store.

    Windows 8/8.1

    See instructions at Microsoft Knowledge Base http://support.microsoft.com/kb/2622803/

    Windows 10

    Repair MBR in Windows 10: click to expand

    1. Boot from Windows 10 installation DVD.

    2. Press any key at the “Press any key to boot” message

    3. When you get to the screen with “Install now” button, сlick the Repair your computer button in the lower-left corner.

    4. Click on Troubleshoot

    5. Click on Advanced options, then select Command prompt

    6. Use Bootrec tool to repair the MBR by running the following commands in command prompt, one after the other:

    • bootrec /RebuildBcd
    • bootrec /fixMbr
    • bootrec /fixboot

    7. Exit and reboot the computer

    Please keep in mind that fixmbr is supported only on x86-based machines.

    How to repair windows bootloader problems (if your computer won’t start)

    In this article, we help you to fix Windows Server 2019 Boot issues with necessary troubleshooting steps. Read along to know more!

    So you have installed Windows Server 2019, and the system is not booting up for some reason. This can indeed be a devastating and annoying experience. While it may not be much easy to come up with a real solution and resolve boot-up issues on your Windows Server, we may be able to resolve the issue by trying out a few options. We have listed out the steps below, which should be easy to follow for most IT Professionals.

    What causes the Windows Server Boot Failure?

    Windows Server 2019 can fail to boot for a variety of reasons and analyzing the exact reason may not be that easy and straightforward. Whatever be the cause, the primary factor that causes your device fails to boot would be the corruption or any other issue affecting your boot files.

    You can check out the options to repair the boot files with ease. The solutions, as we said, will be dependent upon what is causing the problem. Let us attempt resolving the boot issues on your Windows Server 2019.

    How to Fix Windows Server 2019 Boot Issues?

    One of the best solutions that can be useful in resolving the boot failure on your Windows Server 2019 would be to use DISKPART utility. It has been observed to be the real troubleshooter in most of the cases.

    Here are the steps that should help you address the bot issue with an easy to use interface and procedure.

    Step 1 – The Prerequisites

    Before you begin using the DISPART utility, start with the following steps to start using the DISKPART utility for your boot issues.

    • Boot your computer to the Windows Server DVD
    • Click on Repair your computer.
    • You may need to click on the appropriate links if you need drivers. Check out the prompts provided on your computer screen.

    Once you have configured your drivers if they are needed, launch Command Prompt. You can launch it using the SHIFT+10 key.

    Step 2 – Run the DiskPart utility

    The next step would take you to the actual problem solving the task. Follow the steps as in the instructions provided herein –

    DiskPart

    Disk Vol

    Check the disk letter associated with your DVD drive. Note it down. You will need it for the upcoming steps.

    Select Vol X.

    This will make the chosen drive the active one for your installation.

    Copy f: BootMgr c:

    This step will help overwrite the files on your system drive. However, if the Boot Manager is already available on your system, you will be asked to confirm whether you would want to overwrite it or copy the files. You can confirm by pressing whether Y or N.

    Step 3 – Complete the task

    Well, the last step in fixing the Windows Server 2019 boot issues would involve applying the changes and making the copied files to the default boot file location for your Windows Server installation path or directory.

    Follow the steps here in the below instructions –

    The above Bootrec /Fixboot command will fix the boot files on your server. The Bootrec /rebuildBCD command scans your computer for the Windows installation files. It will list out the installation files if it finds any.

    You will now be expected to confirm whether you want to add them to Boot Configuration Database or BCD. Confirm your choice by typing in Y.

    If everything goes well, your system should now be configured to boot from the standard partition on your computer — exit from the DiskPart utility and reboot into your Windows Server in the normal mode.

    Above steps didn’t work? These may be the reasons…

    The Bootrec/rebuildBCD command that we used above should ideally solve most of the issues on your system. The system will rebuild the BCD files continuously as long as you have the installation files available on your computer.

    There are instances when the command is likely to fail. Here are the reasons that this can happen.

    • Your device may already have the BCD or Boot Configuration Database
    • The operating system itself may have issues.
    • The operating system may have significant damages and may need to be addressed.

    If the operating system has been damaged beyond repair, you will be forced to reinstall it from scratch.

    Any Other Solutions to address the Windows Server 2019 failure?

    The best option to address the Windows Server 2019 would be to use the above installation options. If both of these commands fail, you have no other options except for performing a full format installation. Annoying it may be, but there would be no other option than reinstalling your device.

    Of course, you can check for any hardware issues before you resort to the option of a full format reinstall. A few ports or other hardware elements may have got damaged. Discussion of those failures is beyond the scope of this post.

    The Concluding Thoughts

    Well, like we already mentioned and made it clear in the previous sections, the boot issues on your Windows Server 2019 can have several reasons and one of the best solutions that should ideally address the concern is to use the DiskPart utility. The major issues that cause the bootup problems can be the corrupted operating system or the corrupt boot files. While the damaged boot files can be addressed and the issue resolved with the help of DiskPart utility, you would need to be extra careful when handling the operating system issues.

    Have you been able to find any other resolutions for the boot issues on Windows Server 2019? Do share your tips and tricks with us.

    A professional system optimizer allowing you to easily perform diagnostics and fix common problems on any computer.

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    • Fully compatible with Windows 10/8.1/8/7/Vista/XP(32-bit/64-bit).

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    Professional Boot Doctor – Fix Various Computer Boot Errors

    Windows Boot Genius can burn bootable ISO Image with a blank CD/DVD or USB to help you boot your PC and fix all boot issues on Windows.

    • Boot up computer that won’t boot.
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    • Fix Windows blue/black screen of death after boot, login or update.
    • Recover missing boot sector to fix “NTLDR is Missing”, “BOOTMGR is Missing” errors, etc.
    • Repair crashed MBR, corrupt registry, virus-infected registry key value and partition table.

    How to repair windows bootloader problems (if your computer won’t start)

    How to repair windows bootloader problems (if your computer won’t start)

    Reliable Password Finder – Get Your Password and Key Back

    Computer locked and can’t log in due to the wrong password? Can’t reinstall or upgrade Windows system because of unmemorable product Key? No worries, Windows Boot Genius is here to help you:

    • Quickly reset lost Windows local/Domain password.
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    Comprehensive Data Rescuer – Recover Data from Crashed Computer

    Windows Boot Genius offers 4 recovery modes—Deleted Recovery, Formatted Recovery, Partition Recovery, Raw Recovery, which guarantees a very high rate of recovery.

    • Recover files lost from formatted or crashed hard drive.
    • Repair corrupt, altered, or lost partition table.
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    How to repair windows bootloader problems (if your computer won’t start)

    How to repair windows bootloader problems (if your computer won’t start)

    Versatile Disk Tool – Backup & Restore Windows, Hard Disk and Partitions

    Windows Boot Genius is also a thorough disk tools that enables you to backup, restore, clone, manage as well as wipe your disk or partition.

    • Backup Windows system, applications, and files in case that you want to restore them.
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    • Clone a partition or hard drive if the hard drive is damaged or gets virus attack.
    • Manage partition to optimize your disk usage and protect your data.
    • Erase any sensitive business and private data from the computer before giving computer to another one.

    Other pages Compare editions Product tour Sitemap Support

    Feel free to contact us any time!
    Hot Tips Recover forgot Windows 10 Password Reset Windows 8.1 Password Windows 7 password reset disk Windows domain password reset Reset 2008 domain password About US PasswordSeeker focus on Pssword Reset technology 8 years and has become leader of developing Windows password reset tools. Learn more >>

    Messages Including Error Code 0xc0000001 Windows 10

    Error Message 1

    Error Message 2

    Error Message 3

    Or, you may get this warning after the loading of the system: “Security Accounts Manager initialization failed because of the following error: A device attached to the system is not functioning. Error Status: 0xc0000001.”

    The error message may vary in different situations. Yet, no matter what error message it is, the error code is always “0xc0000001”.

    Tip: Besides the problem in the above, there are many other errors you may encounter while using Windows or its programs, such as the “Your virus & threat protection is managed by your organization” error of Windows Defender.

    Causes of Error Code 0xc0000001

    #1 Damaged System Files

    #2 Damaged SAM File

    #3 Damaged RAM

    How to Fix Error Code 0xc0000001?

    According to the causes above, you can choose the related solution below to fix your problem. If you can’t figure out the cause of your error or your case is an uncommon one, then, you can try the following fixes one by one until you get your issue solved.

    Tip: Don’t forget to reboot your computer every solution you have tried to see whether you can succeed or not. If you can, it means that your problem is fixed. If not, just move to the next solution.

    Solution 1. Use sfc /scannow to Check System Files

    If your problem is caused by damaged system files, you should make use of the Windows built-in System File Checker function to deal with your issue.

    1. Connect an installation disk to your computer and boot from it.

    2. Select your language, time and keyboard input, etc. and choose Repair your computer and go on.

    3. Navigate to Troubleshoot > Advanced options > Command Prompt.

    4. In the CMD, input sfc /scannow and press Enter key.

    5. Wait until the task finishes.

    Solution 2. Copy SAM File from Repair Folder

    If you get the 0xc0000001 error due to a damaged SAM file. Then, you can handle the error by copying the integrated SAM file from the Repair Folder.

    1. Boot from the installation disk.

    2. Go to Repair your computer > Troubleshoot > Advanced Options > Command Prompt.

    3. In the CMD, type copy C:\Windows\Repair\Sam C:\Windows\System32\Config and press Enter.

    4. If it asks you whether you want to overwrite the original file or not, just input Y (yes).

    Note: This operation will remove all credentials (username and password) that your current system has. And it will revert to the original username added when you install Windows.

    Solution 3. Check RAM

    If your issue is caused by the damaged RAM, you should check it for solutions. Check the newly added RAM modules. Replace the new RAM modules to see whether you can log into your system or not. If yes, it most likely is the new RAM module that causes you the error. If not, keep checking for other RAM modules.

    If your situation is none of the above three, you may try the following methods.

    Solution 4. Run chkdsk

    If the file system of your system disk is damaged, you can also receive the error 0xc0000001. To fix it, just follow the below steps.

    1. Boot from your installation disk.

    2. Move to Repair your computer > Troubleshoot > Advanced Options > Command Prompt.

    3. Type chkdsk c: /f and press Enter.

    4. Wait until it completes.

    Solution 5. Run Windows Startup Repair

    Or, you can rely on the startup repair feature of the system itself to fix your problem.

    1. Still, you need to boot from your installation disc.

    2. Then, navigate to Repair your computer > Troubleshoot > Advanced Options > Startup Repair.

    3. It will start diagnosing your computer. Wait until it finishes.

    Besides, there are still some other ways to solve the Windows error 0xc0000001, like reset your PC, check system disk integrity, uninstall suspicious programs, remove problematic files, and so on. No matter which method you take, hope you can solve your problem ASAP.

    BTW, it is necessary to take action to avoid such errors. For example, make full use of the built-in Windows Defender to protect your computer and keep it safe and sound. Moreover, it is wise to back up your crucial data regularly to avoid losing data during such errors.

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    Published by Timothy Tibbetts on 03/28/2021

    If your computer won’t boot, not all is lost. There are five free apps that you can use to boot from CD, DVD, or a thumb drive to run diagnostics, make repairs remove malware, back up files, and more.

    TIP : Hard to fix Windows Problems? Repair/Restore Missing Windows OS Files Damaged by Malware with a few clicks

    Because each app is similar, we’ll start with our favorite and work backward, although there’s no wrong choice here. Every one of these apps is 5-star rated on MajorGeeks by our readers.

    1: Sergei Strelec’s WinPE for Windows

    Sergei Strelec’s WinPE is a bootable repair and diagnostics image for maintenance of computers, partitioning, backup and restore, diagnostics, data recovery, and more.

    2: Ultimate Boot CD

    Ultimate Boot CD (UBCD) is a bootable ISO that consolidates as many diagnostic tools as possible into one bootable CD, DVD, or thumb drive. It is the most popular on MajorGeeks and is updated regularly.

    3: UBCD4Win

    UBCD4Win is a bootable CD that contains software that allows you to repair, restore, or diagnose almost any computer problem. It is the second most popular on MajorGeeks and is no longer updated. This shouldn’t be a problem, and it might be your best bet for Windows 7 or XP when newer apps designed for Windows 10 don’t work. UBCD4Win is based on the also no longer updated Bart’s PE Builder.

    How to repair windows bootloader problems (if your computer won’t start)

    4: Hiren’s BootCD PE

    Hiren’s BootCD PE is an emergency diagnostic boot disk based on Windows 10 PE x64. It wasn’t updated for six years but came back in 2018. Hiren’s Boot CD includes drivers to get your network working.

    5: SystemRescueCd

    SystemRescueCd is a Linux system rescue disk available as a bootable CD-ROM or USB stick for administrating or repairing your system and data after a crash. It is Open Source and regularly updated.

    For a Windows 2000 version of this article, see 124550.

    Symptoms

    When you attempt to start Windows XP, you may receive one of the following error messages:

    Error message 1

    Windows could not start because of a computer disk hardware configuration problem.

    Could not read from the selected boot disk. Check boot path and disk hardware.

    Please check the Windows documentation about hardware disk configuration and your hardware reference manuals for additional information.

    Error message 2

    Windows NT could not start because the following file is missing or corrupt:

    Please re-install a copy of the above file.

    Error message 3

    Winnt_root\System32\Hal.dll missing or corrupt:

    Please re-install a copy of the above file.

    Additionally, you may experience one or more of the following behaviors:

    If you start the computer to the Recovery Console, a command prompt may appear with no option to log on to the Windows installation.

    If you try to access the Windows folder, you may receive the following error message:

    If you try to perform a Repair operation from the Windows XP CD-ROM, the Windows installation is not detected and you cannot repair Windows.

    Cause

    This behavior can occur if any or some of the following conditions are true:

    The Default value in the [Boot Loader] section of the Boot.ini file is missing or invalid.

    Windows XP is not installed in the location specified in the Boot.ini file.

    The Ntoskrnl.exe file is missing or damaged.

    The partition path in the Boot.ini file is not set correctly.

    General hardware failure.

    Resolution

    To resolve this issue, use either of the following methods.

    Method 1

    Edit the Boot.ini file to restore or correct the Default entry and to ensure that the other entries in the [Operating Systems] section of the Boot.ini file point to the appropriate directories.

    For more information about how to edit the Boot.ini file, click the following article number to view the article in the Microsoft Knowledge Base:

    289022 How to edit the Boot.ini file in Windows XP

    Method 2

    Use the Bootcfg utility in the Recovery Console to correct the Boot.ini file:

    Use the Windows XP CD-ROM to start your computer.

    When you receive the message to press R to repair Windows by using the Recovery Console, press the R key.

    Select the Windows installation that you want, and then type the administrator password when prompted.

    Type bootcfg /rebuild, and then press ENTER.

    When the Windows installation is located, the following instructions are displayed:

    Add installation to boot list? (Yes/No/All)
    [Type Y in response to this message.]

    Enter Load Identifier:
    [This is the name of the operating system. Type Windows XP Professional or Windows XP Home Edition.]

    Enter OS Load options:
    [Leave this field blank, and then press ENTER].
    After you perform the preceding steps, restart the computer, and then select the first item on the boot menu. This should allow Windows XP to start normally.

    After Windows XP has successfully loaded, the Boot.ini can be modified to remove the incorrect entry.

    For more information about how to edit the Boot.ini file, click the following article number to view the article in the Microsoft Knowledge Base:

    289022 How to edit the Boot.ini file in Windows XP

    Method 3

    Start the computer by using your Windows XP CD-ROM. Press any key to boot from the CD.

    After the setup files are finished loading press R to repair using Recovery Console.

    When you are in the recovery console, select the installation to log on to (usually number 1), and then press ENTER.

    Login to the Administrator account by typing the password for this account, and then press ENTER.

    At the recovery console command prompt, type the following command, and then press ENTER:

    For Uni-Processor systems:

    expand :\i386\ntoskrnl.ex_ :\Windows\system32\ntoskrnl.exeFor Multi-Processor systems:

    expand :\i386\ntkrnlmp.ex_ :\Windows\system32\ntoskrnl.exe
    Note In these two commands, the placeholder represents the drive letter of your CD drive, and the placeholder represents the drive letter of the hard disk on which windows is installed.

    If you receive a prompt to overwrite the file, press Y.

    Type exit, and press ENTER at the command prompt.

    Method 4

    Start the computer by using the Recovery Console, and then run theCHKDSK /rcommand.

    Note You do not have to include the /p switch in the Chkdsk command-line because the /r switch causes the Chkdsk utility to locate bad sectors and recover readable information. This command implies the /p switch..

    More Information

    If the Default value in the [Boot Loader] section of the Boot.ini file is missing, Windows XP displays a new entry, Windows (default), on the OS Loader (boot loader) menu, and then defaults to the new entry. The Windows (default) entry points to the following path to load Windows XP:

    multi(0)disk(0)rdisk(0)partition(1)\WINDOWS
    For more information about the Boot.ini file, click the following article number to view the article in the Microsoft Knowledge Base:

    102873 Boot.ini and ARC path naming conventions and usage

    For more information about Recovery Console in Windows XP, click the following article number to view the article in the Microsoft Knowledge Base:

    307654 How to install and use the Recovery Console in Windows XP

    I’ve recently replaced my dualboot (Ubuntu/Win10) by (Pop!_OS 20.04/Win10). Now, when I start my computer, no boot menu is shown and it boots directly into windows. Here’s what I’ve tried so far:

    I repaired the systemd-bootloader as described here, however, this didn’t fix my problem.

    I Inserted an Ubuntu Livestick (which has GRUB installed) to get into the grub menu. From there I don’t start ubuntu, but go into the GRUB command line and set the bootloader to systemd as follows:

    This lets me boot into Pop!_OS (But doesn’t show a menu as well, so I could not boot into windows from there). It also shows, that the systemd bootloader is generally working

    I then figured that the problem might be with windows, so I booted into windows and then checked the Boot Configuration Data with bcdedit . I had a similar issue with my ubuntu installation and I could fix it by defining the path of the grub efi file as bcdedit /set path \EFI\ubuntu\grubx64.efi . Turns out, there really is an issue there.

    • First of all, there is the bottom line telling me “A device which does not exist was specified“.
    • Second, it seems like the wrong device is chosen for the . Currently, the device is defined as “partition=C:”. However, the EFI files I’m looking for are not on the C: partition but on Disk1Partition1. The problem is, I don’t know what this partition is called, i.e. how I need to define it in the bcdedit entry such that it gets recognized during startup. Here’s the output of bcdedit

    And here is the Disk Management window of Windows, which shows you my configuration. the systemd-efi files are located on Disk1 Partition1.

    How to repair windows bootloader problems (if your computer won’t start)

    Also, here’s some information about my computer

    How to repair windows bootloader problems (if your computer won’t start)

    Does anyone have a clue on how to solve this issue?

    This article describes how to change the system or boot drive letter in Windows.

    Applies to: В Windows 10 – all editions, Windows Server 2012 R2
    Original KB number: В 223188

    Summary

    Don’t use the procedure that’s described in this article to change a drive on a computer where the drive letter hasn’t changed. If you do so, you may not be able to start your operating system. Follow the procedure that’s described in this article only to recover from a drive letter change, not to change an existing computer drive to something else. Back up your registry keys before you make this change.

    This article describes how to change the system or boot drive letter. Usually it isn’t recommended, especially if the drive letter is the same as when Windows was installed. The only time that you may want to do so is when the drive letters get changed without any user intervention. It may happen when you break a mirror volume or there’s a drive configuration change. This situation should be a rare occurrence, and you should change the drive letters back to match the initial installation.

    To change or swap drive letters on volumes that can’t otherwise be changed using the Disk Management snap-in, use the following steps.

    In these steps, drive D refers to the (wrong) drive letter assigned to a volume, and drive C refers to the (new) drive letter you want to change to, or to assign to the volume.

    This procedure swaps drive letters for drives C and D. If you don’t need to swap drive letters, name the \DosDevice\letter: value to any new drive letter not in use.

    Change the system or boot drive letter

    This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, see How to back up and restore the registry in Windows.

    Make a full system backup of the computer and system state.

    Sign in as an Administrator.

    Locate the following registry key:

    Select MountedDevices.

    On the Security menu, select Permissions.

    Verify that Administrators have full control. Change it back when you are finished with these steps.

    Quit Regedt32.exe, and then start Regedit.exe.

    Locate the following registry key:

    Find the drive letter you want to change to (new). Look for \DosDevices\C: .

    Right-click \DosDevices\C: , and then select Rename.

    You must use Regedit instead of Regedt32 to rename this registry key.

    Rename it to an unused drive letter \DosDevices\Z: .

    It frees up drive letter C.

    Find the drive letter you want changed. Look for \DosDevices\D: .

    Right-click \DosDevices\D: , and then select Rename.

    Rename it to the appropriate (new) drive letter \DosDevices\C: .

    Select the value for \DosDevices\Z: , select Rename, and then name it back to \DosDevices\D: .

    Quit Regedit, and then start Regedt32.

    Change the permissions back to the previous setting for Administrators. It should probably be Read Only.

    If users are experiencing Windows 10 boot problems, IT can turn to the Master Boot Record or Startup Repair to diagnose and resolve the issues.

    How to repair windows bootloader problems (if your computer won’t start)

    The new operating system might be a step up from previous versions in a lot of ways, but Windows 10 boot problems still pop up that it cannot fix on its own.

    There are a number of steps you can take if a Windows 10 computer fails to boot properly, as long as you know what tools to use and where to find them.

    Four of the top approaches for solving Windows 10 boot problems are launching the Startup Repair tool, repairing the Master Boot Record (MBR ) , scanning the system for corrupt or missing files, and running the Deployment Image Servicing and Management (DISM) tool.

    The Startup Repair tool scans a system for corrupt or missing files, as well as improperly configured settings, and then it attempts to repair them.

    To launch the tool, go to the Advanced Options screen and click Startup Repair. You might have to confirm which administrator account to use and provide a password.

    If Startup Repair can fix the Windows 10 boot problems, it does so automatically. If it cannot, you should receive a message that it could not repair the PC. In such cases, use the advanced repair options to launch the command prompt window and open the Startup Repair log file in Notepad, which is available in recovery mode. The following path shows the directory and file name:

    The file shows you where the Startup Repair tests failed. From there, you can use the other advanced tools to address any issues.

    The MBR is a data structure within a partition that allows a computer to find and load the OS on startup. If the MBR is corrupted, Windows 10 won’t boot properly.

    You can use the Windows bootrec utility to repair the MBR. To do so, launch the command prompt window from the Advanced Options screen and then run the bootrec utility like you would any other command-line utility, using the following syntax:

    When you run bootrec / , replace the placeholder with one of the following:

    • Use fixmbr to write the MBR to the system partition, without overwriting the existing partition table, and resolve MBR corruption issues or remove nonstandard code from the MBR.
    • Use fixboot to write a new boot sector to the partition if the boot sector is damaged, has been replaced with a nonstandard boot sector or if an earlier Windows OS is installed.
    • Use scanos to scan all disks for installations not compatible with Windows 10 if the Boot Manager does not list a Windows installation.
    • Use rebuildbcd to rebuild the boot configuration data store when you must completely rebuild the store.

    You can run most of the utilities Windows supports with the command prompt window in recovery mode. If bootrec doesn’t work, try system file check (sfc).

    The sfc utility checks for system files that might be corrupt, missing or in some other way problematic. The utility automatically replaces the corrupt or missing files with the correct ones. To use sfc to scan a system, open the command prompt window and run sfc /scannow.

    You might need to navigate to the %WinDir%\System32\ folder to run sfc. You might also need to run sfc several times to ensure that it catches all issues. If after all this you receive a message stating that some corrupt files could not be repaired, it’s time to use the DISM tool.

    Show off your knowledge of Windows 10 features

    Are you a Windows 10 expert? Flaunt your knowledge with this quiz about app compatibility, the OS upgrade process and more.

    Like bootrec and sfc, the DISM tool is a command-line utility, dism. You can use DISM to mount and service Windows images, including Windows image files and virtual hard disks. The DISM tool comes with Windows and is also distributed as part of the Windows Assessment and Deployment Kit. In addition to configuring Windows features and settings, you can use DISM to repair a Windows image, both offline and online.

    Consider using the DISM tool even if the sfc utility does not uncover any issues. To use DISM, launch the command prompt window and enter the dism command using dism / [/ . ].

    You can include one or more options when calling the dism utility. The primary options include the following:

    • Use checkhealth to verify whether the image has been flagged as corrupted and whether the image can be repaired.
    • Use scanhealth to search for component store corruption.
    • Use cleanup-image to perform a cleanup or recovery operation on the image.
    • Use restorehealth to search for component store corruption and then try to automatically repair the image.

    DISM also supports several options for specifying where to find the offline image or whether to run the utility against an online image. For example, the following command searches for component store corruption and performs a cleanup operation on a running instance of Windows 10:

    Other repair options for Windows 10 boot problems include using the Reset This PC option on the troubleshoot screen to reinstall Windows, either retaining personal files or deleting them.

    You could also use the System Restore option in Advanced Options to return Windows to a specific restore point or the System Image Recovery option to restore a previously saved image. From the Advanced Options screen, you can also try the Startup Settings option to launch the system in safe mode or use the Go Back to the Previous Build option to return to the last build.

    How to repair windows bootloader problems (if your computer won’t start)

    Table of Contents

    What causes Winload EFI error?

    If instead they have a UEFI based computer with a traditional old BIOS, the particular problem can be caused by just about any specific setting in UEFI called Secure Boot. This may prevent system users from accessing winload. The efi statement appears which causes this error. 4 In Windows and later, all features are enabled by default.

    Is Winload EFI important?

    Efi executables apply to UEFI oriented computer systems and usually perform file loading tasks for you in the computer’s bootloader. They contain very important information about how the online setup process should proceed. Hence Winload. Efi files are very important for successfully booting the operating system.

    What is Windows system32 Winload EFI?

    Winload. The efi manual entry is an executable file of some kind of EFI environment with a bootloader that initializes the environment and starts Windows booting. If this file was corrupted, missing, or definitely configurable at boot time, there is a path to a non-existent winload volume. track, efi Windows 10 won’t start.

    How do I fix Winload exe error?

    Select the “Troubleshooting” section, then “Repair your computer.” Then click “Command Prompt” when the administrator enters bootrec and restartbcd. Press Enter and wait for the command to complete. Then train as usual; it might work.

    How do I fix Windows System32 Winload EFI in Windows 10?

    Use Autostart Repair to Repair the Windows Boot Loader

    1. Boot from Windows 10 installation media (or UEFI bootable USB);
    2. Click “Repair Yourself” or press R;

    Go to Troubleshooting » -> «Advanced» -> Startup recovery options;

  • starts the recovery wizard. Then follow these instructions.
  • How do I fix Winload EFI error?

    restore winload. efi cuts or damages windows in 8. Restart your computer. Press the button to enter sneakers into your system’s UEFI menu. Look for the “Secure Boot” option. Select the Secure Boot option and make sure it is disabled or disabled. Save changes. Restart your computer.

    How do I fix Winload EFI is missing or corrupt Windows 10?

    1. Boot from the Windows 10 installation content (or a bootable UEFI emergency USB);
    2. Click Repair your computer, press or R;
    3. Go to the ” Troubleshooting -> Advanced. Options -> Startup Repair;
    4. The repair wizard starts. Then follow the instructions.

    How do I fix missing Winload efi Windows 10?

    How to fix winload. efi is missing disabled or has an error” in Windows 10/8/7?

    1. Method . Disable CSM Compatibility Mode but enable Secure Boot.
    2. Method 2: Check for system errors.
    3. Method 3: Run System File Checker to check the integrity of the system document.
    4. li > Method 4. Rebuild BCD and MBR.
    5. Method all five. Repair the EFI bootloader.

    How do I fix Winload EFI in Windows 10?

    How to fix winload. efi is missing, may contain errors” in Windows 10/8/7?

    1. Method. Enable CSM compatibility mode and remove secure boot.
    2. Method 2: Check the disk structure for errors.
    3. Method 3: Run the system check file to check the integrity of the system database for verification.

    Method 4. Rebuild BCD and MBR.

  • Method tricks. Repair the EFI bootloader.
  • How do I fix Windows System32 Winload EFI?

    fix winload. efi without or broken windows inside 7

    1. Insert the installation CD.
    2. Restart your computer and boot from the CD.
    3. Click Repair your computer.
    4. On. System Restore On on the Options screen, select Command Prompt.
    5. Run the following queries: bootrec /fixboot bootrec /scanos bootrec /fixmbr /rebuildbcd bootrec.

    How do I fix Windows system32 boot Winload EFI?

    restore winload. efi not showing up in Windows or corrupting your 8

    1. Reboot your computer.
    2. Press the appropriate key to actually boot into your system’s UEFI plates. …
    3. Look for the Secure Boot option. …
    4. Select the Secure Boot option and make sure it is disabled or disabled.
    5. Save changes.
    6. Restart your computer.

    What causes Winload EFI error?

    Typically, the problem occurs after a system update fails, when the hard drive or file system is affected, when the newly partitioned hard drive uses third-party tools, updates the antivirus program, and then transfers the operating system image to another hard drive. disk, replacement of the computer motherboard, as well as other interventions. Winload.