This is what i did ( For ppl who has Arma 2 / Arma 2 Arrowhead on Steam ) MIGHT WORK First go into Steam Libary ( to your games ) Here click Arma 2 and opened properties on it ( select Local Files and click Verify Integrity of game cach ) ones done ( It will likely say 1 file missing ) do same to Arma 2 Operation arrowhead.. After that i went and installed Six launcher and installed DayZ via that... But i still keeped getting the error and i was about to pull out my hair, when i desided to try Arma 2 skirmish mission ( some tank mission in the desert if i remeber right ) and i tried singplayer storymode.. probaly played for like 20-1 hour and then i desided to give DayZ 1 more try before logging for the night. LOOK and Behold it stopped giving the error and started to work. Might be Luck though, but its worth a shot But thats pretty much how i got it to work, and havent had problems since.. Beside the few stupid Artifacts most ppl get now :P