I’ve fixed the problem!!! I downloaded AMD Radeon drivers from the DriversFree.org website and now the game works. I would suggest that people with the same problem (with a notebook pc that has two GPUs) right click on the desktop and if there are no options relating to GPU selection then try and find new drivers for the high performance GPU. My notebook is a Samsung NP530U4B and i couldn’t find any drivers for the Radeon GPU on the Samsung site so i did a quick Google and found the drivers on DriversFree.org