Hey guys, I've followed the Worrom Guide in the official thread at: http://dayzmod.com/forum/showthread.php?tid=2421 Installation and everything was successful, but when I try to run the game, CMD prompt opens for a split second then nothing happens at all. Here is a screenshot: I bought ARMA 2: CO JUST for Day Z so I'm quite devastated with it not working. SOLVED - STEAM NEEDED TO RAN AS ADMIN.