Eh?... Help please...

[Alieni²]

Well... I was couple hours ago playing CS:S and after that HL2 well they worked just fine... then i shut down my comp and when i hour ago came back i was going to go play CS:S again.. well this error occured (pic below). It gives me the same error everytime I try to launch any source based game. cs 1.6 and dod and other non-source games work just fine... Ive also tried to press "ok" but it just freezes steam for like 1 min and after that it tries to launch the game again, and same error shows up. Well I guess I could delete every source based game and download them again but... maybe easier way?...

Teh Error...

 

[Striker]

you prob have corrupted files... uninstall steam and re-install.

 

[Alieni²]

you prob have corrupted files... uninstall steam and re-install.

omfg... NOOOOOO!!!! heh well seriously I got every freaking game that steam has to offer installed... lots of downloading if i uninstall steam

 

[mortiz]

Have you tried just deleting the cache for HL2 & CS:S? You'll be surprised at how quickly STEAM reacquires them for you.