Well I finally got it fixed. Thank you, NavyLCDR for pointing me to the Showkey plus application. I was able to use it to find my Windows 7 key, and with that and a (finally) helpful Microsoft...

Let me reply to a few of these posts:

1. My licenses are not OEM licenses, and I'm not, of course continuing to run the old PC.

2. I have not read the entire EULA recently (who has?) but my...

Warning: DO NOT upgrade the hardware on your Windows 10 machine.

There is a serious issue with Windows 10 activation.

Background: I upgraded my main system from Windows 7 to Windows 10 and...