Hello, I need help. My windows xp computer keeps restarting itself constantly. I will turn the computer on and as soon as I log in my account for xp, the computer will restart. It will continue to restart until, after many restarts, it will finally shut down completely only to turn back on if I leave the power cord unpluged for a few hours. Sometimes it will even begin restarting even if I don't log in, it will constantly restart from the xp login screen. I'm not sure what is causing the problem and any information will help, thank you.