adam37 said:
reinstall steam completely (save your config.cfg file first), after you uninstall thru add/remove programs, delete the steam folder from c:\program files. Then reinstall steam completely.
I did this and now when I try to open the game, it starts to open and then just completely shuts down. Basically the same thing as before, but without the error window popping up.
Edit: I lied, its giving me the same error message 