*Which version of the game did you purchase? STEAM or RETAIL or MIXED: steam *Are you running an Arma 2 OA beta patch? If so what version?: not sure, fresh install *Which method are you using to launch the game? I.E Sixupdater/steam/batch file: steam and Dayz commander *What is the Error/Problem you're having? Please provide screenshots if possible: wrong CD key wrong serial number *Your PC specs: i7 930, 5770 Radion, 256 SSD *Your Operating System: windows 7 *Have you looked at these threads?: yes, yes yes, I just reinstalled Arma 2 and i'm not able to update because it says I have the wrong key. does this mean I have to buy it again? also wrong serial number when I use DayZ commander... for clarification I get to: Right Click ARMA 2 Operation Arrowhead > Properties > Local Files > Verify Integrity of Game Cache | Let it run Right Click ARMA 2 Operation > Set Luanch Options | Remove any text that is located in there, then close it. and these don't make sense. Also do I have to use the beta?