Hi guys, got a bit of an issue with my PC. Spec is Windows 7 x64, 4GB RAM, nVidia 8800 GPU, AMD Phenom Quad Core 2.4GHz and a 1TB HDD and 130GB HDD. Story is, my PC boots up fine, no problem, logs in fine too. However, after about 2 - 10 mins, Windows freezes. No warning, no error, nothing! Power is still going to the PC. Ran ScanDisk on both drives but they came out clean. Ran Disk Defrag, no problems found. This also happens in SafeMode. No strange things found in MSCONFIG, Startup Folder, Registry. Virus scan ran, nothing found. I have 2 theories: 1. My room is too cold for the PC to operate* (but if this was the case, the PC just wouldn't power on, would it?) 2. PC might need cleaning. *The weather in the UK has been really low these past few days and this issue only happened at the beginning of the week as the temp lowered. Thanks in advance for your help. -FireFox276