I keep getting disconnected from every sinle server I try and then a window shows up saying that I have signed out (WTH?). I read somewhere that it might be because I do not have punkbuster enabled but there is not even such an option in the game settings and there certainly wasn't any option to install it during setup. Any ideas?!?

There is no punkbuster in the game at all.

I see. Thanks for the quick reply. What could cause the sudden disconnection/sign out?!?