Hab genau das selbe Problem gehabt. Hab dann im Internet das gefunden. Bei mir hats geklappt.
1.Download and install the PBSVC program from http://www.evenbalance.com/downloads/pbsvc/pbsvc.exe 2.Open the program and Uninstall PunkBuster 1.This will clear any older versions of PunkBuster that may be experiencing an issue 3.After uninstalling the program, download and run PBSetup from evenbalance.com/index.php?page=pbsetup.php... 4.Once downloaded, open PBSetup and select Add a Game and add Battlefield 3 from the available list. 5.After adding Battlefield 2, click Check for Updates until you receive a message stating No New Updates Needed.