Not sure if this is the correct forum for this or not. Not sure it's an XP problem. For over a month now my machine will just randomly shut down with no error message, no blue screen, nothing then automatically restart. I always check the Event Viewer. Originally gusvc, QBCF Monitor and avg8emc along with Intuit Update Service, Security Center and ATI Smart always show up. I turned off the Google update and the Quickbooks CF. I uninstalled and reinstalled AVG. Those 3 do not show up any longer in the Event Viewer. But Intuit Update (I turned off automatic updates on both Quickbooks and Turbo Tax so don't know what is Intuit that's set to update), ATI Smart and Security Center still show up in viewer. I've run MemTest86+ and it says memory is fine. I ran SeaTools for Windows (couldn't get the DOS version to work) and it said Long DST fail. All the others passed. I've updated my ATI drivers. My system will sometimes run for days without shutting down. Today, it's shut down 3 times already. I've blown out my CPU well! Numerous times. lol. I've checked all cords/plugs and everything is in tight. There is no consistency on the programs I'm running at the time of shut down. Usually I have my mail open (Thunderbird), Firefox, etc. but sometimes it does it in the middle of the night when I'm not even on it. Any suggestions? I'm about to pull all my hair out here!!!