2. Did you download and run the Creative Cloud desktop app uninstaller listed in solution two?
The error, "Couldn't uninstall Creative Cloud for Desktop. You still have Creative Cloud applications installed on the computer that require it," only occurs if you try to use the included uninstaller application. Using the Creative Cloud for desktop app uninstaller will allow the Creative Cloud desktop app to be installed.
3. Was the correct OOBE folder deleted as part of solution three?