all seem to be up to date and the computer used to work fine, we've tried reinstalling windows (once or twice) and the same problem still continues. Also tried replacing the C: drive with another harddrive which had Windows Ultimate on it, this worked for a while but then went back to the screen that is the problem.
Safe Mode works but once I start normally it starts up but then at the end of the flashing of the windows logo it says "Not Supported" on the monitor and you cannnot start it normally. I tried Microsoft's "Fix It" help option and came up with "The current video card driver
isn't compatible with the Windows Display Driver Model"
The graphics card is Asus EAH5870 (ATI Radeon HD 5800 Series), Asus P7P55D Motherboard and I am also running Windows 7 Home Premium 64bit
Does anyone know if there is a WDDM for my graphics card or how I can fix this at all?