If you are getting kicked out of COD4 games supported by Punkbuster for "Unknown Windows API function [131133]", the problem is with Steam.
Go into Stream and turn off Steam Community In-Game
View -> Settings -> In-game -> Uncheck Enable Steam Community In-game
This should fix the problem until Steam and/or Punkbuster resolve the issue.
Posted by michael at November 24, 2007 11:35 AM