I've been trying figure out an issue on my friends computer for almost 2 days now. After several minutes of browsing on the computer, it'd restart on its own. I checked the power options, and figured it must've been a virus, so I formatted the drive, and installed a fresh copy of Windows XP Home Edition. 45 mins into browsing (while installing some drivers), it restarts itself again, and continues to do so. This time, I tried installing a fresh copy of Windows XP Pro, and now set-up can't finish without it continously restarting itself. Clearly its a hardware issue now correct? Only thing I can think of a maybe a faulty power supply? The computer restarts, not shut off. Any ideas? Thanks!