Ok first off I'm not that knowledgeable towards computers so bear with me please. Whenever I'm on the computer (anywhere from an hour to 12 hours). I don't get any problems. I leave my computer on when I goto work (usually because I'm selling items in game so I have to leave it on) and when I come back my monitor is black and won't come back on when I move my mouse or w/e. So I'm assuming my computer froze. The thing is, this used to be a problem and it has stopped for a while. Just recently it started doing this again. I've done all the ad-aware scan/virus scan/defrag/system restore. None of that work. I've tried cleaning my computer by removing the dust and stuff. None seems to work. Here's my current specs: 1.5 gigs of ram AMD Athlon 64 3800+ Venice 2.4GHz Socket 939 Processor Model DA3800BPBOX BIOSTAR TForce6100-939 939 NVIDIA GeForce 6100 Micro ATX AMD Mobo 3D Fuzion 3DFR76256GSE GeForce 7600GS 256MB 128-bit GDDR2 PCI Express x16 SLI Supported Video Card Maxtor 53073h6 (20gigs - I had another one with 100 gigs but that burnt out..been lazy to get another one) 550W power supply Another thing I like to point out is that I think it's my hard drive (I had it since 2001) but it hasn't caused problems at all so I think it might be it. Also another note is continuing to "run" even though it froze. Another thing is that my Temperatures are at nvidia card: 56^C and GPU is 46^C. All my drivers,I believe, are uptodate. So please any help?