Windows 7 Beta Problem? -

Right after I install Windows 7 Beta, it restarts and I see the windows logo and everything. But when I go into the login screen or whatever its there, its ALL black except for a VERY thin line on top. That line is the background. But for some reason the rest isn t. Only the line on top. I run a Nvidia intergrated graphic card. 3 gigs of and AMD Athlon Dual Core 3600+ 1.90 GHz