Doing some further digging, I found a posting about ACEDAO.DLL and DAO360.DLL and their registry keys. The keys on my laptop do exist, but are different, so I thought I would register them so that my registry entries would be the same (except of office14
vs office16). When I tried to register them, I get the diagnostic entitled "Error" and content "The operating system is not presently configured to run this application".
When looking up that error, with the history of what has happened to get me to this spot (Office 2013 was on this laptop before Office 2016), I am wondering about an incomplete removal of Office 2013 (it does not appear in Control Panel Apps & Features).