How to Fix Bootmgr Is Missing in Windows XP

1. Open your anti-virus software program and run a full scan on your computer. Delete all quarantined and infected files when the scan is complete.
2. Insert your Windows XP Install CD into your computer's CD/DVD-ROM drive. Restart your computer.
3. Press the 'R' button on your keyboard when the screen says 'Welcome to Setup.'
4. Type in the admin password when prompted. Press '1' and then 'Enter' to open the command prompt.
5. Type 'fixboot' into the command prompt.
6. Press 'Y' when a pop-up box appears, asking you for confirmation.
7. Restart your computer and you should be taken to your desktop.