I've learned my lesson not to use driver sweeper at all. When people say it really screws up necessary files on windows 7, it's so true. Driver sweeper was fine with the older windows but with windows 7, on my system and other systems i've build, really does more harm than good.
I used driver sweeper back then to get windows to do a clean install and install the standard vga drivers. In the past with windows 7, uninstall, use driver sweeper, windows always kept installing older drivers from somewhere even after using driver sweeper. So frustrating! And plus CCC would sometimes work and not work.
Now with a fresh format I stay clear from driver sweeper on any machine. The newer drivers uninstall perfectly and installs the standard vga driver and since have never had a issue with ATI drivers.
Same goes for using driver sweeper for my ASUS sound cards, screws everything up!!!