Thank you for your answer; I have just now re-installed Malwarebytes on my PC.
You were very helpful and it was so easy to follow your recommendations.
To AdvancedSetup (and Porthos): Thanks for the Followup, I really don't know what happened - I went
to bed last Wednesday Night (Feb 12) and woke up Thurs morning with my computer having
turned off as if an Auto Update had occurred. (It's happened before with no problems.)
When I attempted to login with my previous PIN, an error message came back saying something
to the effect of "cannot update your information," so, I had to change my password. Somewhere
along the way, I noticed a notification that the SUPPOSED update was "Windows 11."
(I subsequently learned from my nephew that there is no such thing.)
**Note that I never turn off my computer, except for re-starts to periodically check for updates, and,
my one vacation per year.**
Anyway, the repair shop I took it to ran some kind of "forensic" program and it ran for three complete
days before they backed up everything and was able to rebuild my PC so it would work.
Unfortunately, as I've been going through all the saved files, none of then are usable as they are, so
far, corrupted and not able to view or run. (I doubt that any of the saved files/data that I will be looking
at will be usable.)
My PC was bought on sale for a 50% discount at Best Buy. As far as programs go, it had virtually nothing
extra on it and I was using a lot of free programs I found on the internet - Open Office, etc. However,
this repair shop, for its standard rebuild package, installed Windows 10, MS Word and Excel 2007, and
other programs that I haven't yet delved into. I figured I came out ahead because with the original price
I paid and the rebuild, I still have only about $500 invested in the PC, albeit I lost 15 years of stuff.
Anyway, Prothos and AdvancedSetup, you were very helpful and my situation is solved. And now, I
have a new project to occupy my time going forward.
Thanks and Best Regards,