Driver issues can cause a lot of headaches. Typically you see people that have partial or old versions of a driver along with the more current ones. Guru3d has a software program called "driver sweeper" that is great for cleaning up drivers. Uninstall your current video drivers, then reboot to safe mode and run driver sweeper to clear anything left out. Then reboot and install your new drivers and you should be set.
It's also not a bad idea to download your drivers directly from the manufacturer site. If you have an older card the drivers on the cd can be out of date.