How to Fix the “BOOTMGR is missing” Error

The “BOOTMGR is missing” error often appears during the startup process on Windows systems, accompanied by a black screen with the message “Press Ctrl+Alt+Del to restart.” This error typically relates to issues with the boot manager, which might be due to a damaged boot sector, incorrect BIOS settings, or other problems. Here’s a guide on the primary causes and effective solutions to fix this error.

Main Causes of the “BOOTMGR is missing” Error

  • BOOTMGR file is either missing or corrupted.
  • Incorrect BIOS settings (e.g., wrong boot order).
  • Faulty or disconnected hard drive where the OS is installed.
  • File system errors or damaged system files.

Methods to Resolve the “BOOTMGR is missing” Error

1. Restart the Computer

In some cases, a simple restart can fix the problem if the error is due to a temporary glitch. Press Ctrl+Alt+Del to restart your computer and see if it resolves the issue.

2. Check Hard Drive Connections

Ensure that the hard drive is properly connected. It may not be recognized by the system due to a loose or damaged cable. Turn off the computer, check the connections, and then try again.

3. Set Correct Boot Order in BIOS

Enter the BIOS and make sure the hard drive with the operating system is set as the first boot device. Access BIOS by pressing a key (often F2, F10, or Del) during startup. Navigate to the boot section and set the correct drive as the primary boot option.

4. Restore Using the Windows Installation Disk

If the above steps didn’t work, use a Windows installation disk to repair the issue:

  • Insert the Windows installation disk or USB drive.
  • Boot the system from this media.
  • Select “System Repair” and open Command Prompt.
  • Enter the following commands in Command Prompt: 
    bootrec /fixmbr
bootrec /fixboot
bootrec /rebuildbcd
  • Restart the computer to see if the issue is resolved.

5. Use System Restore

System Restore can revert the system back to a state before the error occurred. Use the installation disk or recovery environment to initiate System Restore and select a restore point from before the error appeared.