Make sure you get a Windows 7 display driver from your graphics card vendor. The MS drivers shipped with Windows 7 are, shall we say "weak" when it comes to supporting high end graphics. Open GL support is really lousy.
You might try setting your display setting to "software" (not sure the exact lingo in the edge UI) but you give up a lot of speed. But obtaining a true driver from the vendor is the best thing to do.