I noticed that in the latest CC version (v5.02) there's a button "Repair" in the "Un-Install Program" section of CC. (Was it already in a previous CC version ??) I assume that that button uses the "Repair" feature of the "MS Installer" subsystem ?
That reminded that there's a program that can remove orphaned MS Installer files.
Perhaps the developers of CC are willing & able to see how this program works (contact the author ??) and add this "Remove orphaned MSI files" feature to a next version of CC ?
(Perhaps this feature is already included in the "un-install program" section of CC??)
I need to add that this "Repair" button (as mentioned above) gets highlighted when I choose e.g. MS Word. And I know that MS Word uses the "MS Installer" subsystem/feature to install that program. That's why I made the connection with the program that (supposedly) removes orphaned MSI & MSP installation files.