Holy Rusted METAL Batman!!! Wow I just got really excited while reading this thread: "Computer Shut down...need cooling help" It's in this forum somewhere, I couldn't link to it because I'm new. You know, Schmutz, how you asked this: "BTW, does anything happen just before it shuts down? Do you get crazy colours on the screen" YES! YES, that's what happens to me!! "If you get any of the first two things I've mentioned it could be your graphics card, because I've had them problems before and it was linked with the graphics card overheating or malfunctioning." Please let it be that. Please tell me I don't have to get a new heatsink or CPU or update the BIOS...AGAIN... But here is the kicker: This only happens if I let the computer sit for a while, say, overnight. After such a hiatus - I turn the computer on, and after about 3 minutes, the screen goes nuts and it either freezes or shuts down and restarts, or both. The funny thing is, once it does this freak out thing, I turn it back on and it's fine!! I will run indefinitely without a hiccup! This was happening before Windows was installed. So it's not a Windows driver problem. Do you think it could be my video card? Here's what I'm running: ASUS M2N-SLI Deluxe AM2 NVIDIA nForce 570 SLI MCP ATX AMD Motherboard AMD Athlon 64 X2 6400+ Windsor 3.2GHz Socket AM2 125W Dual-Core Processor G.SKILL 2GB 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Desktop Memory Rosewill RP550-2 ATX12V v2.01 550W Power Supply EVGA 256-P2-N615-TX GeForce 7600GT 256MB 128-bit GDDR3 PCI Express x16 SLI Supported Video Card Western Digital Caviar 500GB 7200 RPM SATA 3.0Gb/s HDD ZALMAN 9500A 92mm 2 Ball CPU Cooler (yes, I put one, rice grain sized, drop of Arctic Silver Thermal Grease between the CPU and heatsink) Why, oh why - does it shut down after 3 minutes and then restart and act totally fine???