Weird GPU Error

[JohnKovac]

"application csgo.exe has been blocked from accessing graphics hardware" - it makes my monitor either brown or black and usually freezes my computer for a tad bit then I will be forced to close the program. Any ideas?

[Biggerboot]

I used my google-fu and came up with this.  It has a few fixes you can try: https://steamcommunity.com/app/730/discussions/0/38596747815376419/

 

You can also try re-installing your video drivers with DDU if none of those work.