This was passed along to me from ATI to solve a recent CCC issue I had. The CCC won't load, but this did resolve the issue.
"Suggested steps for clean uninstall of CCC:
1. Check registry location to be empty.
a. HKCU/Software/ATI/ACE
b. HKLM/Software/ATI/ACE
2. Check (Program Files folder )/ATI Technologies/ATI.ACE to be empty
3. Check (Windows folder)/Assembly to see if there's any files with Public Key Token of "90ba9c70f846762e". Sort by Public key token to get a easier view. All these should be uninstalled by right click and uninstall.



