Select your hard drive where Windows is installed and press Enter.Use the arrow keys to highlight Boot Option #1 and press Enter.In BIOS, head to the Boot tab using the arrow keys.

Check your PC manufacturer’s website if this button combination doesn’t work for you. Select System and Security, scroll down to Administrative Tools and click on it. When the computer starts, you can choose the system you want to start. When our computer has multiple operating systems installed, it calls up the Boot Manager in Windows 10/8/7. In most PCs, you can press and hold the F2 key and then press the Power button to do so. Go to Start menu search bar, type in ‘control panel,’ and select the Best match. Windows Boot Manager (BOOTMGR) is a tool for booting the operating system. To fix this, change the boot order in your computer’s BIOS and set your primary drive as first in the boot order by following the steps below: The “Bootmgr is missing” error can also occur if the PC is not booting from the primary hard drive but instead from an additional drive that doesn’t have the required files to boot the computer.

If you have multiple hard drives, read the next solution below.

The BIOS setup utility closes and the computer boots into Windows. By default, most computers are setup to boot from a CD/DVD drive and a USB drive before booting from the primary hard drive. The computer can boot an operating system from a hard drive. that could possibly be confusing your computer by making it think it’s a bootable device when it’s really not. Go ahead and eject any USB drives, CDs, DVDs, Blu-ray discs, etc.

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