Have treid all sorts of ini file settings. Have tried with and without the beta update. Have tried all compatability modes. Have manually set the GPU options to force the game to use the GPU but I get the feeling it still isnt using it and that is why the screen is black. I've tried opening the game with specified GPU but get an error message saying I dont have permission even when launching as admin. Have also played with diffrent power settings on the laptop.
Been trying all day and totally out of ideas now

Running windows 8.1 on an Asus ROG laptop with nvidia 960m and 16gb of RAM
Cheers,
Andrew