I'm not sure what's happened to my PC, but it seems to me that everytime I run Half-Life (CS) my system, crashes? I don't get a blue screen or any error message coz the screen just goes blank and my monitor LED shows that there's no input from the box. The fans keep spinning but that's pretty much it. I can't be certain that HL is causing this problem since it only started to happen today. I have a feeling that it's a Windows problem more than anything. Has anyone experienced a similar problem like mine?