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!?
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.