Hey everybody, I've recently bought Arma II; Combined Operations on Steam, and when I installed both of them and tried running Arma II, the game opened up, went to the Bohemia Interactive logo, then the window closed and a pop-up appeared and said "Bad Serial Number during Setup" (or something along those lines).
I've read other threads here about this problem, and I heard that starting Steam as an administrator fixed the problem. However, this is not the case for me. I've tried running steam as admin; no success. I've tried running Arma II as administrator; no success. I've tried Verify Integrety of Game Cache; no success. I've tried REINSTALLING the damn game; no success.
I'm at wits end people. Does ANYONE know what I should do about this? I really wanna play the DayZ mod! D:
