Windows Vista is not starting up! This error message is appearing on your screen:
"BOOTMGR is missing, Press Ctrl+Alt+Del to restart"
You don’t have to worry about, this can be fixed very quickly
Solution
All you will need is a Windows Vista installation disc to repair windows startup.
Restart your pc,
Go to your Bios setup to boot from your CD/DVD drive
Insert the Windows Vista Disc
Select the language, currency format and keyboard input, click “Next”
Click on “Repair your computer”
Select the your installed Operating system, click "Next"
Click on “Startup Repair”
This will take some time then you will be asked to restart your computer!