I first uninstalled McAfee Web Advisor. That didn't fix the problem. Next, I used regedit to search for all occurrences of "mfesapsn". There were several, including,
It is the GUID in the latter that conflicts with the Analog Devices CrossCore Tools class, which causes its installation to fail. I'm not sure whether deleting the LEGACY_MFESAPSN registry entry(s) was necessary, but I did delete them.
I also had to manually change permissions on several of the registry keys and some subkeys before I was successful at deleting them.