I installed RC1 from Microsoft's website, and I am trying to run it on my 40" 1080P display. I want to run at 1920x1080, but it is only displaying at 800x600 on my screen. When I choose 1920x1080, my tv is just black with an error message blinking. I have a HIS Radeon 4760 video card. I think there might not be a driver? Could this be the issue? If so, am I just out of luck or what?