How to Repair a Master Boot Record
A Master Boot Record (MBR) is a file that is used to control the startup of a Windows XP computer. If this file is corrupted, your computer will fail to start up properly. With a Windows XP installation disc, you can repair the MBR and enable your computer to start up properly again.
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Instructions
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Restart your Windows XP computer (or turn it on if it is off).
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Put your Windows XP installation disc into your computer's CD/DVD drive and press the "Boot Menu" key, which is displayed on the screen when the computer first starts up. This key is usually the F12, ESC or DEL key.
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Press the "R" key at the Welcome to Setup screen and wait for the Recovery Console to load.
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Type "1," press the "Enter" key, enter your Administrator password and press the "Enter" key again.
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Type "fixmbr," press the "Enter" key, type "exit" and press the "Enter" key a final time to fix the MBR and exit the Recovery Console, restarting your computer.
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