client and server product versions do not match

[MadShoe]

The fucking fucker keeps fucking telling me that "Client and server product version do not match". Its really fucking starting to piss me the fuck off. Somebody please fucking enlighten my ignorant self as to the fucking way to fucking fix this fucking fuck-up.

[MadShoe]

I FUCKING restarted steam, logged out and back in, still nothing FUCKING works. The FUCKING program is FUCKING conspiring against me. I feel I have no FUCKING choice but to blow up my FUCKING computer.

[Sarge]

did you uninstall and reinstall yet?

[CMDRRABB]

Try starting Steam instead of FUCKING steam. You are trying source and not other, correct?

[skull[jp]]

you have to verify your game cache

right-click your game inside steam and go to properties