How to Fix: Bootmgr is Missing

How to Fix: Bootmgr is Missing

/ Shayne Sherman

The error “bootmgr is missing” indicates that the boot manager has not been found on your computer. This usually means either the boot files have been deleted or corrupted or the hard drive containing them has failed.

The boot manager is responsible for loading and managing the operating system at startup; if it can’t be found, the computer won’t boot up properly. This error can also occur if your computer is set to boot from an external device like a USB drive or CD-ROM, but there are no media in the drive.

Restart your Desktop or Laptop

If you’re having trouble getting your computer to boot up and seeing the error message “boot mgr is missing,” don’t panic! You may be able to fix the issue by restarting your PC. Restarting your computer is a simple and effective way to troubleshoot many problems, including boot errors. Restarting your computer can give it a fresh start and potentially fix the problem.

restart computer

Remove All Removable Media

Removing all removable media is a simple and effective way to fix the problem of a missing bootmgr. The bootmgr is an important system file used to start the operating system, and when the windows boot manager is missing, the system can’t boot.

Removing all external storage devices, such as USB flash drives, CDs, floppy disks, and DVDs, can help resolve this issue because they can interfere with the boot process and cause the bootmgr to become corrupted or deleted. Once all removable media are removed, the system can be restarted, and the bootmgr should be restored.

unplug replug usb device

Change Boot Order in BIOS

Changing the boot order in the BIOS or Basic Input/Output System can solve the “bootmgr is missing” problem. This error message typically appears when the computer cannot find the boot manager, a small program that helps load the operating system.

By changing the boot order, you can specify which device the computer should look for the boot manager on, such as a CD or USB drive. This can help resolve the issue if the boot manager has been misplaced or the computer is trying to boot from the wrong device.

Step 1: Restart your computer.

Step 2: While rebooting, press a specific key to go into the BIOS.

(Note: The key depends on your Operating system. It can be the following keys: F2,F8, F10,F12, Esc or Del, etc.)

Step 3: Go to the Boot tab, check the boot sequence, modify the boot order, and set the boot device to Hard Drive.

change boot sequence in bios

Recreate BCD from Windows Recovery Environment

Recreating the Boot Configuration Data (BCD) from a Windows installation disc can solve the “bootmgr is missing” problem. This error message typically appears when the computer cannot find the boot manager, a small program that helps load the operating system. You can rebuild the boot manager’s configuration and restore the missing boot manager by recreating the BCD.

This can be done by booting the computer from a Windows installation disc and using the command prompt to run the bootrec utility, which can rebuild the BCD. This process can help resolve the issue if the BCD has become corrupted or the boot manager has been misplaced.

Step 1: Insert Windows Installation Disk, restart it from the disk, and click Repair your computer.

windows repair your computer

Step 2: Click Troubleshoot > Advanced options > Command Prompt, type C:, and hit Enter.

Rebuild MBR with Command Prompt

Step 3: In the command prompt, type the following commands and press enter:

bootrec /fixmbr

bootrec /fixboot

bootrec /rebuildbcd

Chkdsk /f


Step 4: After completing each command, type exit and restart your PC.

Run Startup Repair

When a bootmgr error message appears, it can be a difficult and confusing problem to solve. But don’t worry; one of the options that can help is performing a startup repair. Startup repair is a Windows tool that can help diagnose and fix certain system startup problems.

It can fix problems like corrupted system files, missing or damaged boot files, and other issues preventing your computer from booting up properly. With startup repair, you may be able to get your computer back up and running in no time and fix the bootmgr is missing error.

Step 1: Insert Windows Installation Disk into your computer.

Step 2: Boot your computer from the installation drive.

Step 3: Click Repair your computer.

windows repair your computer

Step 4: Select Troubleshoot > Advanced Options, then click Startup Repair.

select startup repair

Step 5: Select your Windows Installation.

select windows installation

Use System Restore

Step 1: Insert Windows Installation Disk into your computer.

Step 2: Boot your computer from the Windows installation drive.

Step 3: Click Repair your computer.

windows repair your computer

Step 4: Select Troubleshoot > Advanced Options > System Restore

select system restore in advanced options

Step 5: Follow the System Restore Wizard instructions and select the appropriate restore point.

Step 6: Choose the most recent restore point and click the Next button.

select system restore point

Step 7: Select Finish to start restoring your computer.

Perform a Clean Windows Installation

If your computer displays “Bootmgr is missing” when you try to boot up, it’s time to consider a clean Windows install. This can be daunting, but it can be a great way to fix the problem and get your computer up and running again. A clean Windows install involves completely erasing your hard drive and reinstalling Windows from scratch.

This will remove any corrupted or damaged files that may be causing the problem. It also allows you to start fresh and eliminate any bloatware or malicious software that may slow down your system. After the clean Windows install is complete, you should be good to go with a clean, speedy system.

Step 1: Boot your computer from the Windows installation disc.

Step 2: Select your Language, Time, currency format, and Keyboard, then click the Next button.

language time input selection

Step 3: Enter your product key, or you can skip it.

Step 4: Select the Windows version you want to install.

Step 5: Select the drive where you want to install the Windows and click the Next button.

Replace the Hard Drive

If you are experiencing the BOOTMGR missing error when trying to boot your computer, one potential solution to fix the problem is to replace your hard drive. This error message typically indicates that the boot manager, a crucial component of the boot process, cannot be located on the hard drive.

Replacing the hard drive with a new one will ensure that the boot manager is present and can properly load the operating system, allowing your computer to boot up normally.

solid state drive

Regularly Update Your PC

Regularly updating your PC can also help to prevent the bootmgr missing error. This error can occur when the boot manager, a critical system file that manages how your computer starts up, is not found or corrupted.

By keeping your system and its files up-to-date with the latest security patches, you can protect against malicious code and other threats that may cause this type of error. Also, regularly downloading driver updates can ensure that your hardware components function properly and communicate effectively with your operating system.

Keeping these updates current is essential to maintaining a healthy computer environment and avoiding errors such as the bootmgr missing message. Furthermore, ensuring that you have an adequate amount of free disk space by deleting old files and programs can also help prevent this issue.

Frequently Asked Questions

What is bootmgr on Windows XP?

Bootmgr is a file that is used to start Windows XP. The “boot manager” contains code to help your computer load the operating system. This file is essential for booting up the computer, as it loads other startup files, including NTLDR (the NT Loader). Without this file, your computer would not be able to start.

What Causes Missing bootmgr on Windows Vista Operating Systems?

Missing bootmgr, or the Windows Boot Manager, is a critical part of the Windows Vista operating system. It usually appears when booting up a computer and provides access to the Windows OS, allowing it to start properly. When missing bootmgr occurs, an error message appears on the screen, BOOTMGR is missing.

Why am I Receiving the bootmgr is missing Error?

The bootmgr is missing error usually occurs when the computer tries to start from an external device or an improperly configured hard drive. This can happen if the Boot Configuration Data (BCD) file is corrupted, missing, or incorrectly configured for the Windows installation. It can also occur if there is a problem with the boot files on your system partition or if the hard drive has been disconnected or replaced without properly configuring it.

What is a bootmgr File?

A bootmgr file is a Windows startup manager that helps control the system’s boot process. It is responsible for loading and transferring control to the Windows 10 operating system kernel to start the computer. The Boot Manager also allows you to select which Operating System you want your PC to boot into if more than one is installed.

Can a USB Help Fix the bootmgr Missing Error?

The bootmgr missing error can be annoying and may seem difficult to solve. A relatively straightforward solution can be implemented – using a USB drive to help fix the bootmgr missing error. This method involves copying the necessary Windows files onto a USB drive and then using the USB drive to repair the damaged boot manager.

Can a USB Flash Drive Cause a bootmgr Missing Error?

A USB flash drive can cause a bootmgr missing error. If the USB device contains incompatible or corrupted files, then the computer may not be able to recognize them and thus trigger the bootmgr missing error. It is also possible that a virus or malware has infected your USB drive, which can also lead to this issue.

Why is My bootmgr Missing?

There can be several causes for a missing bootmgr. It could result from certain operations that have taken place on your computer and caused the boot manager to become corrupted or deleted. It could also be due to hardware malfunctions, such as a damaged hard drive, or because you recently installed an operating system or other software that interfered with the boot manager.

What is a Boot Device?

A boot device is a storage device containing data and programs used to start a computer’s operating system. It can be either an internal or external hard drive, a USB thumb drive, an optical disc (such as a CD/DVD), or other removable media. The hard drive is the most common boot device, which stores the operating system and all associated files.

Can a Restore Point Fix a Missing bootmgr Error?

Creating a system restore point with Windows System Restore may help to resolve the missing bootmgr. A system restore point is a snapshot of your computer’s settings and files created before any changes are made. If anything goes wrong with the changes, you can use the restore point to roll your computer back to its previous state.

Shayne Sherman
Meet the author

Shayne is an expert on all things Microsoft Windows and computer security. As a Windows user of over 30 years, he has been featured on Business Insider, Yahoo, Tech Republic, Hacker Noon, Techopedia, and many other publications. Aside from entertaining at his home theater, he enjoys spending time with his family, including his English bulldog, Fergie.