Bootmgr Missing

How to fix the “Bootmgr missing” error in Windows

This is a well-known bug among Microsoft operating system users that indicates that the Windows boot sector is Bootmgr missing or damaged. The boot sector is a piece of software that is essential for the operating system to boot properly and is responsible for running the Winload.exe process, which loads essential device drivers and a portion of the Windows kernel. An error that affects essential parts of the system and we are going to show how we can try to fix it.

The lack of Bootmgr missing is an error that can occur in any computer that has a version of Windows after Windows Vista and can be shown in different ways, with a message indicating “Bootmgr missing, press Ctrl + Alt + Del to reboot”, “Bootmgr is missing, press any key to reboot” or simply “Could not find Bootmgr”.

What to do when Windows fails to find BootMgr

Although the first message is the most common, in any case it is the same error, it can be caused by several problems and we can try to solve them in the same way. Among the main causes of the missing Windows Bootmgr missingerror we can find some damaged or misconfigured files, BIOS or UEFI problems, disabled disk partitions, badly connected or loose hardware interface cables, hard disk failures, system updates or trying to boot the system from a drive that is not configured for it.

In order to try to solve this problem of Bootmgr Fault, the first thing we can do is to reboot the computer, something that could solve this error easily and quickly if it is only something specific that a simple reboot can solve, but if when rebooting everything remains the same, then we must proceed to perform other types of checks.

The next one, for example, should be to check if we have any DVDs or USB sticks plugged in and the computer may be configured to give priority to these drives at boot time instead of the hard disk. This would cause the DVD or memory stick connected to the computer to be searched for the boot system and, of course, not found.

hard drive connection

It can also happen that a cable is loose and the computer does not recognize our hard drive. To check if this is the problem, we must open our computer case, as long as it is turned off and disconnected from the mains, and check if all the cables connecting the disk to the motherboard are correctly connected.

If we continue with the Bootmgr missing error, then we will have to run the Windows Recovery Environment (WinRE) boot repair. This will require inserting an installation disk or boot drive, however, the system may or may not automatically detect the media.

If the PC detects them correctly everything goes fine, but if it does not detect the media automatically then we must access the BIOS or UEFI of the computer, look for the section that allows us to change the boot order, which will vary depending on the manufacturer, indicate the unit that we want to be the first one to look for the system’s boot system, save the changes and exit the BIOS or UEFI again.

Next, the Windows Recovery Environment boot repair process will prompt us to select a language, time, currency, and keyboard or input method, click Next, and then click Repair your computer. In the System Recovery Options dialog box, select your Windows installation drive and click Next again.

Bootmgr missing

Now we will have two options, Repair the system or computer and Boot Repair whose processes will try to restore the damaged or lost files of BootMgr and try to solve the system startup problems.

If we still have the Bootmgr missing problem, the next thing we can do is recompile the boot configuration data (BCD) from the Windows Recovery Environment (RE) if we do not have a BCD backup. To do this, we again need the Windows installation disk or boot drive and follow the same steps just mentioned to run the Windows Recovery Environment (WinRE) boot repair until we select the Command Prompt option in the System Recovery Options.

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