Quite honestly your issue is far too vague.
Did you upgrade from XP or Vista?
If upgrading from Vista there are known issues so it is recommended you still format and do a fresh install (first backing up your logon settings and data with Windows Easy Transfer). In the long run most users experience less problems, though it does mean reinstalling all your programs.
Are you sure you have a legitimate copy? Windows will display a black desktop to illegal copies.
It's also possible you have the wrong video driver though since you say it is the same in safe mode this doesn't seem to be the big issue.
Are you sure your hardware was W7 compatible? Did you run the W7 Upgrade Advisor? What is the computer make/model?
Most likely I would back-up the data, format the HD, and try reinstalling.
Last edited by TrainableMan; 05-25-2011 at 11:22 AM..
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