Looks like they closed my thread..
but however;
Ok so basicly, I have played for a year now without any problems and stuff.
But yesterday, I got this "Bad serial number" thingy, and Ive been trying to fix it since that.
I did all of these;
-Run steam as admin
-Run ArmA2 OA as admin
-Deleted OA folders from regedit and verified game cache
-Same as above but with admin rights
-Reinstalling whole game and deleting EVERY arma 2 and OA files and folders.
-I have tried all the ways in the sticky thread.
Sooooooo...
Got any ideas?
PC specs and info;
Win7 64bit
i5 3750k
AMD Radeon HD 7850
8GB of ram