yya thats what i would do too if i wher you i think something is either missng or coruppt in your steam folder althou unless you have probs on your comp too i would just do a complet uninstall and reinstall the game ( helpful hint i would copy your counter strike; cstrike; materials, models, sounds, maps, scripts, resouce, and screenshot folders if ya have any skins or custom gui's or don't wanta have to redownload all the sounds maps and shit from your fav servers N/U right? )

by the way i had to do a compelte reformat but for a TOTALY DIFFERENT REASON LOL