I don't see a tutorial around these parts for DriverSweeper. Here we go.
DriverSweeper. It does exactly that. It cleans up hidden drivers that an uninstall doesn't get rid of. This is used when you switch graphic cards, sound cards, anything hardware that you swap out. Also if the current driver isn't working correctly.
1) Download the latest version of Driver Sweeper
and install it.
2) Uninstall the current software that holds the driver. Restart in safe mode. F8 before Windows splash screen. This allows for graphics, or any driver, to be released. Not in use. Safe mode uses default drivers.
3) Once in safe mode, run DriverSweeper. It is pretty straight forward. Delete any drivers in the list you need to. Written in plain text.
4) Some say to install new drivers in safe mode, some say to install them in regular Windows. I do it in regular Windows myself. Any way that floats your boat, install new drivers for that said card.
You have now fully gotten rid of those old drivers and installed the new!
If any restarts are required after this, please do.
(Anything that needs to be fixed, please say so. Mods may edit post.)