Originally Posted by
waynec_jagsnvettes RESOLVED!!!! The issue turned out to be a bios setting on my MSI Z97 motherboard.
Well, not quite, the issue came back again. I did more internet searches and came across an entry that pointed me to a Win 10 setting for fast boot... Control Panel\Power Options\Choose What the Power Buttons Do\Change Settings That are Currently Unavailable" ... untick "Turn on Fast Startup". My Win 10 was marked for fast boot, though I do not recall ever seeing that Windows setting before, so I assume an automatic Win 10 fix download must have changed the setting. Turning that option off appears to have fixed the problem.