Hi Andy I solved the problem: http://forums.dayzgame.com/index.php?/topic/134282-the-instruction-at-0x00000000-the-memory-could-not-be-written/page-3
I uninstalled Adobe Flash Player, Raptr and RivaTuner. I dont know which of them was causing the problem. Keep working on this perfect game! Btw. I want back my good old Krasnostav airport. :)

Hi Andy,
I did exactly what you told me, but it did not help :/ When I launched the game, it looked like it was in resolution 640x480 and this error popped up and game crashed. "Instruction at 0x00000000 referenced memory at 0x00000000 memory could not be written." When i launched the game for the second time, Dayz crashed like before.