Rakaesa

Yes, my antivirus was active when I reinstalled Arma 2: OA, but the first time I installed it it was active as well and there was no problems whatsoever.

I have tried everything. When I say everything, I mean absolutely bloody everything. So don't ask if I've tried any of the obvious solutions that are in the hundreds of created threads by people that can't use the search bar, or google. I've used both for three days now. I've: Ran in administrator mode. Verified game cache. Use Regedit (Possibly not correctly) Uninstalled and reinstalled game And restarted computer several times. It's on steam, and I get the bad serial number error like everybody else, and nothing I try works. Help?