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So i just bought/installed ArmA 2 CO and I am having difficulties. I have looked at just about every single thread pertaining to the installation, I have opened up ArmA 2 and i have opened OA. But when i open OA i get an error message that says Bad Serial key in setup and closes out the game. Also when I launch CO the cmd box appears and then nothing happens. Any thoughts or advice would be greatly appreciated Running ArmA 2/OA though steam On Win7/x64