Computer specifications: Operating System MS Windows XP Professional 32-bit SP3 CPU Intel Core 2 Duo E6750 @ 2.66GHz 44 °C Conroe 65nm Technology RAM 2.0GB Dual-Channel DDR2 @ 399MHz (5-5-5-18) Motherboard Intel Corporation DP35DP (J1PR) Graphics M208WA @ 1280x960 512MB GeForce 8800 GT (Undefined) 53 °C ForceWare version 258.96 Hard Drives and Optical drives ATAPI DVD A DH20A3H JEL 5QN856V4 SCSI CdRom Device Problem: My computer keeps restarting for no apparent reason. I've performed a memtest, It passed. When I leave my computer on, doing nothing, it doesn't restart. I've reinstalled my PC, formatting it completely, didn't help. I've unchecked the "Automatically restart PC on error" and no BSOD shows up. It's not overheating, since I've got a little monitor on my computer box, always monitoring the CPU heat, and it's always 40-50 degrees celsius. Any idea what could be done?