Not sure if this is the right Forum but I Built this system about 8 months ago. Slight overclock on E6850 to 3825 MhZ. System has been rock stable on Air for the whole time (8 hours orthos, gaming etc). Tonight I logged into World of Warcraft and a patch downloaded which was expected (and should not be the cause of my problem). After 5 minutes of playing, the PC just shut off. I turned it on and it kept happening seemingly only while playing World of Warcraft (online video game). Tested other programs and all seemed fine. Then I ran another game which had never been a problem and the PC shut down again. My system is no longer orthos stable. Seems if I put any stress on the CPU (has also crashed now while on the internet and running an anti-trojan program in the background) it just shuts off. No bluescreen or anything. Seems virus free (ran AVG scan) but can't get through a complete a-squared scan now as I crash. I don't think it is software related. I updated my GPU drivers after the crashes but it didn't help. I do run a UPS system so I don't think it is an electric issue. My first thought was the power supply (OCZ Gamer Xtreme 650) but it doesn't seem hot and It is only 8 months old and should be plenty for my system. Please help. I know just about enough about computers to put together a gaming machine, Overclock a bit, lean out XP, update bois/drivers and install some benchmark, diagnostic software. That's about it and I am lost as to where to go from here. Please help!!!