CS:Source crashes

[AlienHybridX]

Hi when i play cs online for at least 25 minutes or more my game freezes and then i see a blue screen and a weird sound from speakers then my computer restarts any help is appreciated to solving this problem....o and btw I have no problems with other games =\ and this never happened before my gfx is a 9800 non-pro/1 gig ram/2.8ghz p4 ht.

 

[Beerdude26]

First off, do you have two RAM sticks? If you do, try playing with only one RAM stick (Maybe one of them is corrupt and crashes your computer). If still encounter problems with one RAM stick, try again with the other one. If it doesn't crash, that means that the stick of RAM that isn't in your computer at that moment is corrupted and needs to be replaced (Ask the place where you bought the computer for more information).

If none of this helps, it's probably :
A) A video card problem, try playing with another video card (Borrow one from a friend, take your computer to his house or vice versa)
B) Another hardware problem : Hard drive, sound card, IRQ conflicts, etc... Ask for help from a computer technician.
B) A software problem. Here are some troubleshooting tips if it's software :
Link 1
Link 2
Link 3
Link 4

Validating your version of CS:S may also help :
steam://validate/240