Finally, make sure you delete the entire program folder(s) where you installed the Catalysts.
Just delete all the ATI driver files and let XP decide which default files the system should keep.
Alternatively you can use the Windows Search function (Start Search), with the search string ATI*.* to make searching and deletion faster.
Importantly however, do not delete the files under the \Service Pack Files or \Lastgood directories, or under any game or application-specific directories.
Just stick to files found under the two directories mentioned earlier.
Also delete the \Documents and Settings\[username]\Application Data\ATI and \Documents and Settings\[username]\Local Settings\Application Data\ATI directories if you have previously installed the ATI Catalyst Control Center at any point.
Windows Vista: See the 'Viewing, Updating or Uninstalling Drivers' section of the Windows Drivers chapter of the Tweak Guides Tweaking Companion for Windows Vista.
It is trickier to manually remove driver traces in Vista, so you must read the instructions carefully to see how it's done.
Finally, make sure you delete the entire program folder(s) where you installed the Catalyst drivers.
The Catalysts require some attention to detail when installing and setting up, as there are several things you can do along the way to make your entire system work much better with the Catalysts.
Follow the advice in this section to ensure smooth, trouble-free performance from your ATI graphics card.
To do this successfully, you need to follow some simple steps which will help guarantee that your installation of the drivers is 'clean', and leads to trouble-free performance.