I am close to deciding on a new video card so this thread caught my eye.
A search resulted in some posts about that Nvidia enhancer.
I know that ATI has a program that helps completely uninstall all driver files, and lets you start over. Just wondering if Nvidia does the same.
edit to add
Just in case you go for reinstalling drivers;
http://downloads.guru3d.com/download.php?det=745
Driver Cleaner Professional