Steam Error? Help pl0x?

Whenever I try to start up a game, it says:
In hl2.exe we have encountered a problem and it needs to close. We apologize for this inconvenience.
This is a rough translate of Dutch.
When I try to start up CS:S I get the same error.
When I looked in the CS:S map, I saw there was a HL2 map, and HL2.exe.
What does HL2 do in CS:S?
Help?

HL2.exe is CS SOURCE

have you mixed any hacks or non steam files into your steam directory? i suggest a clean up of all valve games/steam and a fresh reinstallation.

It did that to me just reinstall steam and it will work. I just got banned for hacking when I wasn't even hacking. Is there some one I can talk to about unbanning me?

dont even bother bro.

Throw up a screeny of your folder. Ill see what i can do.

jsut curious, what's ur dl speed atm>?

if the problem persists try this if ur on vista

. Try the following: set your DEP for essential windows programs and services only. Right click 'computer' - properties,-advanced settings,-advanced,-under performance,-settings,- data execution prevention,-and Turn on DEP for essential windows programs and services only.

uhh....wrong section?

Just trying to follow the rules...rules are there for a reason. Also, if you put it in steam section you would get more hits.