Are you facing problem loading or starting the Catalyst Control Center (CCC) for your AMD Radeon graphics display card after you upgraded its driver to the latest version?
This is very likely to be caused by .NET Global Assembly Cache (GAC) in your Windows system preventing some of the DLL files in your new version of AMD Catalyst Software Suite from overiding the existing, older version of them in the system. As a result, the newer version of CCC is unable to work with the older version of the DLL files and simply won't start.
To fix this problem, you need to delete all the ATI's assemblies from the GAC before you install the new AMD Graphics Drivers and Software.
In order to delete assemblies from the GAC, you need Administrator's right as well as to turn off the Windows User Account Control (UAC).
Go to Control Panel > System and Security > Change User Account Control settings and pull down the setting to the lowest level.
You will need to restart your Windows in order to complete this task.
After system restart, use your Windows Explorer to go to \Windows\assembly folder and delete (uninstall) all the assemblies with this Public Key Token "90ba9c70f846762e". You can click on the Public Key Token tab to do a sorting, locate for the assemblies to delete, highlight them with your mouse, and push the Delete button on your keyboard.
When you are done, you may set back your Windows UAC to its original level, usually the 2nd bar. You will need another round of system restart to change the UAC setting again.
Now, install the new AMD Catalyst Software Suite and the optional AMD Catalyst Application Profiles, Hydravision Package and AMD Media Codec Package.
You should be able to launch CCC now!