Problem PC crash some time

[Nox06]

hi some time after 2 3h playing game i get an error all programs stop work skype, winamp, utorrent,mess etc and sounds interrupted some1 know why?

sistem:
AMD Athlon II x3 450 unlock to phenom x4 b50
ati6670
ram 4gb ddr3 1600

sr for bad english.

 

[RealBeast]

Since it happens after several hours of gaming, the first thing that I would check is overheating -- run a CPU temp monitor. HERE is one that works well and is free. It would be best to watch the temperatures during a stress test using Prime 95.

Another good check is to test your memory, although it is probably ok, THIS is a good test program and is also free, just burn to a CD and boot from it.