WinXP hangs or restarts
My home computer is giving me fits lately. It either hangs up which requires a reset to recover from or restarts itself several times a day. I've had Norton on it from day one, scanned, updated, scanned again. It has never found anything wrong. Spybot found a few minor things but it didn't help either. I've removed all the temp internet files per some suggestions on Annoyances.org. I installed a CPU temp app to check for overheating and it all appears normal. IE is up to date, disk is defraged with Norton Systemworks, plenty of RAM and HDD space. What now? Power supply voltage? System is a P3 running WinXP, IE, etc.