Hmm, lots of views but no comiserators. Well, let me update then. I tried several things attempting to narrow down where the problem was. Whatever I tried would work for 3-4 days and then the problem would return. And I think I tried just about everything available in Windows 10 Home. The Pro version might have more to fiddle with. Last resort was the master reset available in Windows Settings>Network & Internet>Status and Network Reset at the bottom of the list. It says that it removes and replaces all the various comm bits involved and requires you at the end to log back in to your wifi router. Six days now with no problem. If that changes, I'll be working on it again.
N71JQ-A1, G752VM-RB71, GX703HR-XB96