Weird game problem

[Seto0]

I was playing Portal 2 for about 25 minutes and the game closed itself.. No error got displayed, no nothing. So I wanted to play another game (L4D, actually) and again after 20-30 minutes of playing, the game got closed. I'm really confused, what might be the problem?

[RedX]

I have the same thing. Had a long history with gaming-related shit on my pc... I think it's hardware incompatibility and possibly software too (for example how total video converter fucks vice city).

[A maid]

Same here.

[TheGT4sm]

Yeah, I also got that with Portal 2.