One day, you might face this error message BOOTMGR is missing. Press Ctrl+Alt+Del to restart if you’re using Windows Vista. Don’t panic when you saw this error message.

Here is how you can repair this error message:

• Restart your computer.
• Press F12 when you get the BIOS screen up.
• Select on any option for CD-ROM or DVD RW drive and press Enter.
• If you see the message Press any key to continue…, please press on Spacebar or Enter.
• Wait until it loaded into the Windows Vista setup screen.
• Click on Next on the first Windows Vista setup screen.
• Click on Repair Your Computer.
• Click on Startup Repair.
• Once the repair complete, click on Finish and restart the system.

That’s all you need to do and you should be able to boot into Windows without any further errors.