Your Arma has an Acces Violation. (C0000005 ACCESS_VIOLATION at 76FA8CEF)
It means that a file is in conflict with your game.
Fault address: 76FA8CEF 01:00028CEF C:\Windows\SysWOW64\ntdll.dll
Try to deactivate or to delete the ntdll.dll filen and replace it by an new one. (http://www.dlldump.com/download-dll-files_new.php/dllfiles/N/ntdll.dll/5.1.2600.2180/download.html)
(BUT BE WARNED! SAVE THE FILE BEFORE DELETING IT! IT'S A WINDOWS FILE.