Bad serial number?

[SassyRat]

Hello, so I recently purchased Arma2: CO and wanted to play DayZ, however after trying to run OA for the first time, I would get an error message telling me Bad Serial Number Given in setup. I am not to good with computers, I've posted in a few places, people say just run as an admin, I do, but still the same error, so can anyone help me out on this one?

[Kocaine]

First of all do you have a digital or hard copy of the game?

[SassyRat]

I have a digital, bought on Steam.

[Foxhound]

Checking sticky topics before posting is nothing to be ashamed of, if you would have done that you could have found this:
http://forums.bistudio.com/showthrea...hread-for-help
And if checking sticky topics sounds like an amazing lot of work try to search before posting. You type "bad serial" and you find dozens if not more threads about the same issue.