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How to fix Bootmgr is missing error on Windows – Step by Step Guide

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BootMgr is missing is one of the most dreaded error messages one would encounter on a Windows system. This error comes up when the boot sector of your Windows installation is damaged. It appears soon after your computer is switched on. We will discuss the methods we can use to fix BootMgr is Missing error in this post.

What Exactly is Boot Manager or Bootmgr?

Windows Boot Manager is an essential component of your operating system that helps you start Windows. It loads the Volume Boot Code. Volume Boot Code forms part of the core component of your Windows operating system.

The Boot Manager also executes winload.exe. It loads all the required device drivers. The Boot manager missing error can affect different versions of Windows operating system including Windows 10, Windows 8 and Windows 7. Windows XP does not suffer this error because it does not come with a boot manager.

What causes Windows Boot Manager is Missing Error?

Well, several reasons may cause Boot Manager error on a Windows system. Also, there are different types of boot manager errors.
Some of the possible error messages include

  • BOOTMGR is Missing. Press CTRL Alt Del to restart
  • BOOTMGR is missing. Press any key to continue
  • Could not find BOOTMGR
  • Boot Mgr is corrupt. Cannot start Windows


Possible causes include

  • Your Windows Boot sector may be damaged or corrupted or even missing.
  • Issues with your BIOS settings.
  • Any corrupt files in your Windows installation.
  • Your Boot Configuration Data may be damaged.


Windows Boot Manager is located in the root directory of your Windows installation. It is included in the System Reserved Partition of your root directory. It does not come with a drive letter associated with it. The file is hidden and is not accessible.

How to fix BootMgr is missing error?

There are multiple ways you can attempt to fix the Boot manager issues on your Windows installation. It depends upon what causes the Boot Manager issue on your computer.

Method 1 – Reboot your device
The error could be a temporary one. In such cases, a simple reboot can solve the problem. The error could just be a fluke. If a reboot solves your trouble, there may be no need to go into further steps.

This step alone may not solve the Boot Manager issue if it is more severe. However, if you are able to start your computer so that you use other troubleshoot methods. Press CTRL+ALT+DEL to restart your computer.

Method 2 – Change the Boot Sequence

As we stated before, Boot Manager issue can be caused if there are any problems with your BIOS settings. Changing the sequence can solve the issues in most cases.
Follow the steps here below –

  • Restart your Windows system.
  • Enter BIOS Setup option as soon as your computer restarts. The exact settings depend upon your computer manufacturers. Generally, pressing the DEL or F2 takes you to the BIOS screen.
  • Move to Boot Order Options.
  • Check if Hard Drive is chosen as the first boot device.
  • Save the changes and exit.


Method 3- The Diskpart Method

The method helps you fix the corrupted files in your system. Hopefully, this method solves your Boot Manager issues.
Follow the steps carefully –

  • Enter Command Prompt.
  • Type in Diskpart>.
  • Type in List disk.
  • Choose Select Disk 1. Repalce 1 with the disk that yiur Windows installation is located on.
  • Type in Select Partition 1
  • Type in Active.
  • In the end Type in Exit


Press ENTER after each of those steps.
In the above example, we have selected Partition 1 as active. Always check for a partition that has a size of 100 MB. If your system does not have a system partition, select your C drive.
Now follow the steps here below. –

  • Enter these commands one after the other and press ENTER after each of them – bootrec /fixmbr, bootrec /fixboot, bootrec /rebuildbcd and Chkdsk /f.
  • Reboot your computer after all the above commands are executed.

You can, however, use the following method to just rebuild BCD.

Method 4 – Rebuild BCD
This is the simple method that you can perform before going for the previous method. This is the simple version of the above method.
Here are the steps involved –

  • Go to Command Prompt
  • Enter Drive letter corresponding to your Windows Drive.
  • Now enter the following keywords and press ENTER in each step – bootrec /fixmbr, bootrec /fixboot, bootrec /rebuildbcd, and Chkdsk /f.
  • After all the steps are completed successfully, type in EXIT and ENTER

Once done, you can reboot your computer to find if you can boot into Windows successfully.

Method 5 – Windows Startup Repair
You can use Windows Startup Repair option to fix Boot Mgr Missing issue on your computer. This can be achieved by using the Windows installation CD.
Follow the steps below –


  • Insert your bootable Windows CD and strart your computer.
  • Press any key continue booting into CD/DVD.
  • Choose your language options and choose Repair Your Computer
  • In the next screen, click on Troubleshoot
  • On the next screen, click on Advanced Options.

  • On the Advanced Options screen, click on Automatic repair option.

The process should now begin. This automatic repair tool should your missing or corrupt files.
Restart your computer. The BOOT Manger error should now be gone.

Please note that pressing the F8 key when your system is restarting will let you enter the Startup Repair option on Windows 7 or Windows 8.

Method 6 – Replace your hard drive
If all the options listed here above fail and you are still facing the Boot Manager issue, it could be possible that the hard drive is damaged. There could be some physical issues on your hard drive. Consider replacing the damaged hard drive with the new one and reinstall Windows on it.

Must Check – Hidden Windows 10 Features 

The Concluding Thoughts

Well, those were a few steps you could use to fix BootMgr is Missing error on your Windows installation. The methods indicated above should work across any of the Windows version ranging from Windows 7 to Windows 10. Please note that some of the steps indicated above may slightly change.

Have you used any of the options that have been featured above? If yes, do let us know which of them worked for you. Also, share your own experiences and any other solutions you may have come across.

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