This is to install Catalyst, Forceware, and any 3rd Party Video Drivers 

1. Uninstall video drivers and control Panel/CCC.

2. If you have Crap Cleaner run it and scan for issues and fix those issues (Crap Cleaner fixes the issues).

3. Roboot to Safe mode.

4. Run the Driver Cleaner Pro and the tool Cab Cleaner that is in the Driver Cleaner Pro. For ATI cards, when running the Driver Cleaner clean everything except the ATI IGP.

5. Boot your system back to the desktop.

6. Now windows will tell you that there are some hardware found and would want to run a check on drivers. Windows is a plug & play Operating System so every time you add a new device it will give you a new hardware found prompt. To prevent this you must remove the hardware or let windows try to find the driver if you try to cancel it, it will just show up on the next boot so try to install it even if you don't have the drivers windows will just put it on your system without a driver. It won't hurt your system and you won't get the NEW HARDWARE FOUND PROMPT AGAIN. ** Simple Talk: So just let windows find the driver. Once it does that it will tell you no drivers found (that is what you want). Make are sure to check the box to where you do not want the prompt to show up on your next reboot. This will happen every time you uninstall old drivers.

7. Install whatever video drivers you want. If you are having problems make sure  to install the most updated WDM Drivers.

8. Reboot system

9. Run your Crap Cleaner and scan for issues. Fix the issues again. Then reboot again.

10. Defrag your system.

If you are using modded drivers and want to go back to using the Catalyst Drivers/Forceware Drivers just follow the instructions above.  

DriverCleaner 

Crap Cleaner 

***Both of these I do highly recommend!!