msconfig/task manager/restart didn't work.
To me the problem goes back to this machine being a Windows 7 platform from the start
When it was upgraded, it went directly to Windows 10 skipping Windows 8.
There were subtle differences between a "pure" Windows 10 and the upgrade to 10 to begin with. I didn't notice those differences until I saw a machine that came with Windows 10 originally. If you will, the upgrade to version 1073 was the coup de gras for
the control panel on this pc.
I have no way to prove that except that I also have a machine that was originally Windows 10 v.1064. When it was upgraded to v 1073, the control panel still worked. There was something added after the upgrade a Windows old file on C:\ that wasn't on this
pc's C:.
I know if I did a low level format on the HD of this pc, loaded Windows 10 v 1064, upgraded to v 1073, I would have a working control panel
I'll finish with an analogy.
7 was a living room wall painted red. 10 v1064 was white paint that didn't quite cover the red. 10 v1073 bleeds the red to become pink in palces the red showed through. i. e. the wall is neither red nor white.
I'm still open to suggestions.