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I have this error, which I cant find a solution in forum.
Running Win7 pro 64bit, newest Nvidia drivers, BitDefender AV+FW (which I also disabled for test), did recheck files in Steam, also manualy removed files in Steam\steamapps\common\Dirty Bomb\Binaries\XIGNCODE\client\ and they recovered automatically. I tried running game with Admin rights, but still the same problem