After looking into this a bit, I found that this solution seemed to help quite a few people!
- Restart your PC and press F8 durring the startup. When you get options chose Safe Mode.
- Click Start, click Control Panel, click System and Security, and then, under System, click Device Manager.
- In the list of hardware categories, expand the Display adapters category.
- Right click on your display adapter and click Disable.
- Restart the PC normally. See if you can now get to your desktop. If that works you are working with a video issue. If not there are other steps you can try.
Also, check out this site for more information:
Source: http://social.technet.microsoft.com/Forums/en-US/w7itprogeneral/thread/5b94b775-992e-4f48-b3ff-c89b3cf45e82/
I hope this helps!
Brett M,
Windows Outreach Team