There you are, logging into your Windows XP computer and preparing to get to work, check your email or surf the Web. Your desktop appears and the icons on the desktop and in the system tray begin to load when, for no apparent reason, the computer shuts down. It restarts on its own, causing you to think it might have been a fluke. However, as soon as the desktop starts to load, the reboot recurs, repeatedly. You can stop this frustrating cycle once and for all.