>Click Start, click Run, type sysdm.cpl, and then click OK.
>On the Advanced tab, under Performance, click Settings.
>On the Data Execution Prevention tab, Click "Turn on DEP for all programs and services except those I select"
>Click Add and navigate to "C:\Nexon\Combat Arms\" and add "CombatArms_Direct.exe" and "Engine.exe"
>Click OK two times.
yeh restart your computer too