My computer automatically restarted on it own, and when it goes to windows welcome screen in XP it restarts back again, and it does this all the time. Any suggestions?

format c:

virus? try to open last known cong.(When you open your comp F8 tne your last known cong.or safe mode..

This sounds like it coulde be a power supply prob. Try checking the power cord for any minor cuts or defects, if you have another cord try replacing it. Make sure the cord is securly plugged into the PC and the wall, or even try plugging the PC into another outlet, THe outlet itself could be bad. If you know how to use a multimeter try testing the power supply itself. Hope this helps.

First you need to get the machine to stop restarting on errors so that you can get a BSOD and error message. Without these messages and/or info from your event viewer, it is nearly impossible for anyone to troubleshoot. First, please go to system properties > Advanced tab > under startup and recovery click settings > under System failure make sure "Write an event to the system log" is checked AND that "Automatically restart" is UNchecked. Click "OK" and reboot. The next time you encounter a problem, write down the Stop error message and # and post it. If the "Write an event to the system log" from above was already checked, go to your event viewer in administrative tools and check for red circles with white x's under system events. Double click the most recent ones and then click the copy button ( just below the down arrow button). Then paste that info here as well. good luck Cheers