Hello gurus. Having some PC trouble here. about 2 days ago, I was playing Left 4 Dead 2, and after 10-15 minutes the game froze, with looping sound. I did not think much of it and went into task manager. There I noticed I couldn't end the process. I reset my PC, and waited for it to boot into windows, which it refused to do, it kept sitting on the loading screen. I eventually shut the PC down, took the power off and rebooted. This time, it went fine. So I load up L4D2 to rejoin the server. Same problem after 10-15 minutes. This game also froze a couple of times on map load, usually on the same point. Stalker also kept freezing on me, but I sort of disregarded it as an issue with complete mod, (call of pripyat) seeing as many people have problems running it. But it also freezes after 10-15 minutes, and I can't close the process every time. This freeze did not come with sound looping. So I decided to test it with one more game. I installed Rome Total War and you guessed it. It froze after 10 -15 minutes, but no sound looping here either. On the desktop, the PC is fine. no issues at all. Now, the interesting part is, I reinstalled windows today. I was going to be formatting soon anyway, but decided to just do it a little bit earlier considering I had problems with my games. Even on a fresh windows install. the same problems arise, which leads me to believe it's a hardware issue. I tried: - Reinstalling windows - Using older video drivers - I was thinking of testing RAM by just taking a module out, and use different sockets instead of using memtest. I hope it's not an issue with my graphics card. But seeing as the PC can't seem to cope with 3d application, I'm sort of afraid my 1 month old GTX570 is broken. So, any advice on what to do next will be very much appreciated. Thanks in advance.