ok so i have a few questions to ask

my computer i messed up right now and i
have no idea what the F*CK it is.
so i was wondering if you guys might have a
idea. when im playing CS:S, and loading up a knew map,
the screen will randomly go dark
and stay like that, not only that but the sound stops working
to. the computer will be on but nothing will work
any ideas?

crashing vid card/drivers ?

well, for starters, provide us with your system specs (CPU, RAM, GFX card)

Have you run a virus scan, etc.?