==================
UPDATE 12/16/15
Well, I'm back. Same problems started all over this evening 12/16/15. Same random freezing, sometimes 2-3, to 6-7 minutes, then getting control of the cursor and...

Ok. I has this similar problem since late last week, and finally managed to resolve it on Tuesday night. My story:

I downloaded the 64-bit Windows 10 Home upgrade on my newer Windows 8.1 Lenovo...