When installing windows 8 on my hp g62-b05sd. I can use everything but it wo switch to the ati driver that I need to play a lot of games. On windows 7 you have a a special program for this, but it won work on win8.
I had it working once but then it meant that my second graph card would also mean a second screen. so I could play games on it but when I would go too far to the right my mouse would disappear.