First, hello all, I'm pretty new here, and not too experienced. I'm desperate...I have played these games: Assassin's creed, Crysis, Call of Duty4, Medal of Honor:Airborne. Here is the story: after I purchased my PC, games worked great for the first week or two, somehow. Then, Crysis and COD4 started to just freeze, it took crysis shorter time to freeze, around 10 mins, while it took cod4 20 mins~ till it froze, and my only solution is to restart my PC.(i didnt have MoH & Assassin's creed that time) I have sended my PC for repair, and they said they switched PSU. I took my PC back and STILL having the same problem. I then installed MoH:A, played it and it didnt freeze. Then 1-2~ days later it froze(wanted to note it was a very hot day, my pc temp was up to 71C). I took my pc for a full scan, I tould them my pc freeze and maybe my PC have too high temp. I got it back while they said my memory caused problem. Now thats wierd, Assassin's Creedn works like a charm, played it over hour, so is Crysis(which used to freeze so fast) but COD4 and MoH:A STILL freeze my pc! I'm so confused and have no idea what to do, I cant send my PC back to the lab, they will just do more *****ic pc scan and say everything is allright... Oh, and about heating problems, they didnt fix it and their reason was that my PC have sensor and when it comes to too high heat it shuts down the pc, therfore it's not heating problems. I dont know if it's really true, i'll post my temp while playing MoH:A with speedfan: Temp1:65C~ Temp2:35C Temp3:-128C HD0;43C Core 0:50-52C Core 1:50-52C Core 2:50-52C Core 3:50-52C PC specs: CEON 2GN DDR-2 800mhz Fan case 12CM EZCOOL 12CMF 500W REAL Fan case 8CM 19dBA HITACHISATA2 16MB 320GB HARDDISK 8800GT 512MB DDR3 PCIE MSI P35 BEO 7.1 1GLAN MOTHERBOARD Q6600 CORE2 QUAD CPU Translated from hebrew. >< Please if any more information needed, just tell! I hope you can help me, I'm really desperate here. EDIT: I also tryed to update gfx drivers to latest. didnt work.