Windows 7 Graphical Issues

I recently installed Windows 7 Ultimate on my computer and am having graphical difficulties. In the Logon screen and when asking verification for installing a program there are tons of white horizontal lines throughout the entirety of the screen. I tried installing new graphic card drivers but didn't seem to help. Any suggestions!?
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  1. Exact system specs, please? Also, is this a legal version of Windows?
  2. Have you considered the possibility of a defective monitor? Try using your monitor in an another system to check if its working properly.
  3. Is this a laptop or desktop? If it is a laptop, you may want to check with your laptop maker's support (Dell, HP, Sony, etc.) as this sounds like a hardware problem to me. If it is a desktop, do as masterjaw suggested.

    Cheers,
    Cassandra
    Microsoft Windows Outreach
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