This isn't necessarily an app or utility just some instructions I copied and saved with notepad from another hardware forum, cannot remember which one for the life of me. If you've seen this posted somewhere please post so I can give the proper credit. :good2: I've used this method a few times when ATI/AMD was updating drivers what seemed like a weekly basis and if anyone has ever installed video drivers over the top of current drivers you know what kind of weird issues that can cause lol. Anyways here's the process and hopefully if anyone needs it helps them as much as it's helped me 
Guide (ATi-AMD)
Do not use this guide if you have an AMD CPU/Motherboard as you may destroy required chipset files.
1. Go to Add/Remove Programs
2. Uninstall the Catalyst Install manager (Express Uninstall)
3. Reboot the computer and log back into windows as normal
4. Go to folder options and select “show hidden files and folders”
The next part of the guide will remove all ATi/AMD files and folders from the computer.
5. Go to your C drive and remove the “AMD” folder
6. Double click the “Program Data” folder (Normally hidden) and remove all ATi/AMD folders
7. Go back to C and double click “Program Files” and remove all ATi/AMD folders
8. Go back to C and double click “Program Files (x86)” and remove all ATi/AMD folders
9. Go back to C and double click “Users”
10. Access the name of your windows profile and double click “AppData” (Normally hidden)
11. Check the “Local”, “LocalLow” and “Roaming” folders for any ATi/AMD folders and remove them.
12. Go back to “Users” and check the “Default” folder (Normally hidden)
13. Double click “AppData” (Normally hidden)
14. Check the “Local” and “Roaming” folders for any ATi/AMD folders and remove them.
The next part of the guide will remove registry entries left by the AMD drivers.
15. Close everything down and go back to your desktop
16. Click start, then type “regedit”.
17. Click “HKEY_CURRENT_USER” and extend the folder
18. Click “Software” and extend the folder
19. Remove all AMD and ATi Folders
20. Click “Wow6432Node” and extend the folder (Within the software folder)
21. Remove the “AMD” folder
22. Click “HKEY_LOCAL_MACHINE” and extend the folder
23. Click “SOFTWARE” and extend the folder
24. Remove all AMD and ATi Folders
25. Click “Wow6432Node” and extend the folder
26. Remove all AMD and ATi Folders
27. Click “HKEY_USERS” and extend the folder
28. Click “.DEFAULT” and extend the folder
29. Click “Software” and extend the folder
30. Remove all AMD and ATi folders
31. Click “S-1-5-18” and extend the folder
32. Click “Software” and extend the folder
33. Remove all AMD and ATi folders
34. Click “S-1-5-21-1632250243-966907716-928185508-1000” and extend the folder
35. Click “Software” and extend the folder
36. Remove all AMD and ATi Folders
37. Close down regedit and empty your recycle bin
38. Undo the folder options change to hide the hidden folders
39. Reboot
40. Install your AMD/Nvidia drivers and reboot
(Remember, if you look in some of the folders mentioned in this guide but don’t have any AMD/ATi folders, just move to the next appropriate step. This means the uninstall option has removed such files for you. But as we know, the uninstaller still leaves a lot of things behind). For Windows Vista/7. Do at your own risk.

Guide (ATi-AMD)
Do not use this guide if you have an AMD CPU/Motherboard as you may destroy required chipset files.
1. Go to Add/Remove Programs
2. Uninstall the Catalyst Install manager (Express Uninstall)
3. Reboot the computer and log back into windows as normal
4. Go to folder options and select “show hidden files and folders”
The next part of the guide will remove all ATi/AMD files and folders from the computer.
5. Go to your C drive and remove the “AMD” folder
6. Double click the “Program Data” folder (Normally hidden) and remove all ATi/AMD folders
7. Go back to C and double click “Program Files” and remove all ATi/AMD folders
8. Go back to C and double click “Program Files (x86)” and remove all ATi/AMD folders
9. Go back to C and double click “Users”
10. Access the name of your windows profile and double click “AppData” (Normally hidden)
11. Check the “Local”, “LocalLow” and “Roaming” folders for any ATi/AMD folders and remove them.
12. Go back to “Users” and check the “Default” folder (Normally hidden)
13. Double click “AppData” (Normally hidden)
14. Check the “Local” and “Roaming” folders for any ATi/AMD folders and remove them.
The next part of the guide will remove registry entries left by the AMD drivers.
15. Close everything down and go back to your desktop
16. Click start, then type “regedit”.
17. Click “HKEY_CURRENT_USER” and extend the folder
18. Click “Software” and extend the folder
19. Remove all AMD and ATi Folders
20. Click “Wow6432Node” and extend the folder (Within the software folder)
21. Remove the “AMD” folder
22. Click “HKEY_LOCAL_MACHINE” and extend the folder
23. Click “SOFTWARE” and extend the folder
24. Remove all AMD and ATi Folders
25. Click “Wow6432Node” and extend the folder
26. Remove all AMD and ATi Folders
27. Click “HKEY_USERS” and extend the folder
28. Click “.DEFAULT” and extend the folder
29. Click “Software” and extend the folder
30. Remove all AMD and ATi folders
31. Click “S-1-5-18” and extend the folder
32. Click “Software” and extend the folder
33. Remove all AMD and ATi folders
34. Click “S-1-5-21-1632250243-966907716-928185508-1000” and extend the folder
35. Click “Software” and extend the folder
36. Remove all AMD and ATi Folders
37. Close down regedit and empty your recycle bin
38. Undo the folder options change to hide the hidden folders
39. Reboot
40. Install your AMD/Nvidia drivers and reboot
(Remember, if you look in some of the folders mentioned in this guide but don’t have any AMD/ATi folders, just move to the next appropriate step. This means the uninstall option has removed such files for you. But as we know, the uninstaller still leaves a lot of things behind). For Windows Vista/7. Do at your own risk.
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