1.) Try a verify / repair through Galaxy. (Also, ensure Galaxy itself is up to date.)
2.) Install / repair redistributables that come wit the game (DirectX, Visual Studio, etc.)
3.) Update or re-install your video drivers ensuring you select the CLEAN installation option.
If that doesn't do it, then something else on your system is probably hooking the game's processes, like UAC, anti-virus, or the like. Let us know if the above clears it up!