I was able to fix this problem, but I don't like the solution.

This problem started when Microsoft forced me to update Windows Security KB5001337 and KB5001406. Microsoft will not let you uninstall this, saying it's required.

After trying unsuccessfully to uninstall the upgrades, I tried doing an online repair option that Microsoft provides. After reinstalling office, not only did it not fix the problem, now it said that my version of office was no longer activated. The product key for this is Who Knows Where.

So I uninstalled Office 2016 and installed Office 2019 (downloaded a retail version from the web) and the problem has been resolved.

I may have been able to fix it by uninstalling and reinstalling office 2016, but it was a downloaded version and, as stated above, I have no idea where the registration number is.

So. it's fixed, but the solution sucks.

I hope this helps someone out.

Kevin