How to Reinstall BOOTMGR

By Katrina Matterhorn

Windows BOOTMGR is a utility used to boot your computer past the 8GB threshold; it creates and hides partitions, as well as supports the password protection function. For varying reasons, BOOTMGR may not work properly, this could be due to corrupt files or malware. If you see the message "BOOTMGR is missing. Press Ctrl+Alt+Del to Restart," you will have to reinstall it. With the Windows OS installation disc, it will automatically recognize that BOOTMGR is missing and reinstall it for you.

Things You'll Need

  • Windows installation disc

Step 1

Place the Windows installation disc into the computer's CD/DVD drive and reboot the computer.

Step 2

Press "Enter" to load the computer from the installation disc.

Step 3

Choose your default language and click "Next." Click "Repair Your Computer."

Step 4

Select "Windows 7," "Next." The repair option will automatically reinstall BOOTMGR. Once you have received the completion message, restart the computer.