I've upgraded to Windows 8.1 from 8. Still the same issue. Tried reinstalling ARMA II, ARMA II, BAF, PMC. Still asking me for a correct ACR which I do not own. FFS BOHEMIA!!!
---------- Post added at 18:30 ---------- Previous post was at 17:39 ----------
Okay, aparently this all because Gamespy is shutting down. Thats why ARMA 2 at 1.63. Aparently for now we can't use DayZ commander.
THIS IS FROM THE DAYZ FORUM;
Newest DayZ Mod patch was delivered with 1.63.112555, which is compatible with the Steam-Version of ARMA 2: Operation Arrowhead Beta.
From now on you can just use the Steam Version of the Beta, which is recommended, as GameSpy is shutting down tomorrow. From this point onwards the Steam-Server-Browser will be necessary, which the Beta patch is needed for.
If you're trying to run older versions (which is not recommended, as GameSpy shut down) do the following steps when using the Steam Version:
Install ARMA 2 Operation Arrowhead Beta on Steam
Rightclick ARMA 2 Operation Arrowhead Beta in Steam
Go to "Properties"
Select "Betas"
From the Dropdown-Menu select "beta108074-" (this is compatible with 1.62.103718)
Done.
If you now want to switch back, just follow the same procedure and instead select "beta112555-" from the dropdownmenu.