Yeah, LOL, I usually wait for DABhand to come online to answer technical questions xD
I have like this problem and uninstal one program about system's heat,& fixed problem.
[Edited by 64, 6/28/2011 6:39:45 PM]
1. As mentioned overheating..
2. A faulty RAM stick.
Check www.memtest.org/#downiso for various methods of booting into Memtest from startup.
If you have a USB stick grab the USB loader. And boot up from the USB stick, and run the test.
Although Windows 7 has an in built RAM tester by pressing F8 on bootup before Windows starts (after POST) it is not precise like memtest.
Also check your BIOS settings for temps and to check settings that the PC doesn't shut down on a specific temperature.
If those suggestions fail..
Goto START > Control Panel > (if you can't see all the options say to show in classic view) Administrative Tools > Event Viewer.
When loaded check the last days critical errors and check the error messages and report here what they say.
[Edited by DABhand, 6/28/2011 6:31:32 PM]
"Event 41 - Kernel Power:
"The system has rebooted without cleanly shutting down first.
This error could be caused if the system stopped responding,
crashed, or lost power unexpectedly."
Details (in XML):
[Edited by iNTANGiBLE, 7/1/2011 1:29:15 PM]