|It? What's it? If you have no video cards installed and are only using the on-board video controller then you either have the wrong drivers, you didn't install them correctly or the previous driver installation attempts have dumped too many files into your system and/or made incompatible registry changes.|
Uninstall any display adapters from device manager, even the one you're using. Go to 'add or remove software' in control panel and uninstall any video software you've installed if it shows there. (Make sure the uninstalls are directly related to your previous installation attempts. You don't want to remove something you need.)
Reboot the computer. Make sure you have the correct drivers and know how to install them. Then do it.