When I get a new video card what drivers and other things do I need to uninstall?

First, uninstall your current video card drivers. Then shut off your computer, then install your video card. Then boot in safe mode and install the drivers for your new video card, and then you're done! Although booting in safe mode is the best way to do it, you don't HAVE to. I was lazy and just booted it up regularly then installed the new drivers and worked just fine.