Try this
1)right click computer(desktop) then click properties
2)left corner you will see advanced system settings and click it
3)go to advanced tab
4)In Performance border click the button settings
5)click on the tab name data execution prevention
5)click on Turn on DEP for all programs and....
6)then click on the button add
7)locate your warrock.exe (most common direction is: C:\Nexon\Warrock EU\system)
8)Target your warrock.exe and click open
9)click the button ok and restart your computer
10) now load your hack and start warrock!