Bad serial number given in setup

[dignatol 0]

Now, before you say anything or try and mention something.

I have already done all of the following;

Run as Admin

Tried Regedit

Reinstalled like 3 times

Verified(When I did verify it always said that 1 file wasn't able to be validate and will be reacquired[it always says that when I re-verify it]and nothing happens)

Restarted my computer

Run ARMA2 before Running ARMA2:OA

Not sure what else I've done but I've done A LOT and tried to fix it but nothing happened

[Fishi07 0]

Same for me, pls help!

[Wanabrutbeer 0]

Same problem here. I didnt buy CO, but I bought ARMA II and OA, so should be the same as CO right? SO both are installed, and now I get this bad serial number error.

[Legordor 0]

I'm having this problem as well. I just got the game, and I've been trying for a few hours now to play.

[dignatol 0]

I need help. I've been playing fine until today after i restarted my computer.

[metruzero 0]

Yep, same problem please help

[dignatol 0]

Please dear god, who ever answers this and it actually works I will love you forever and give you ALL of my gear in DayZ ;-;