When i look in windows event log this is what i see:

-This first one happends exactly 1-2 sec before that other error comes.
Source: .Net Runtime

Application: arma3.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: exception code c0000005, exception address 615D5516
Stack:

-2nd error.
Source: Application error

Program name with fault: arma3.exe, versjon: 1.24.125.979, tidsangivelse: 0x53bea38c
Module name with fault: D3DCOMPILER43.dll, versjon: 9.29.952.3111, tidsangivelse: 0x4bf73239
Exception Code: 0xc0000005
Error Offset: 0x001e5516
Error process ID: 0x82c
Error starting time of application: 0x01cfa2b3d64f937b
Error application path: D:\Steam\steamapps\common\Arma 3\arma3.exe
Error module path: C:\Windows\system32\D3DCOMPILER43.dll
Report-ID: 2aa997d8-0eac-11e4-95a9-14dae9398e33 {F24383} {F24384}