I am currently using Vista Home Premium SP1, with a Nvidia GTX 295 and Intel Core i7 920. I purchased the Windows 7 Home Premium upgrade disc yesterday.
Near the end of the installation it does one of its usual auto-restarts. After the Windows 7 loading screen finishes, all i can see is a black screen with a mouse pointer, thats it. Then if i restart it takes me to a screen that says "your upgrade failed, restoring your previous version of Windows". I have tried every hint i can find, 9 installs later, and still no closer to finishing.