Thanks, this might be the solution.
I unchecked the following:
Intel USB 3.0 root hub
Intel wireless
MSFT virtual WIFI
Realtek PCLE GBE family controller
We'll see if this cures my problem and also the Ethernet adapter shutting down at times.
Too bad--did not work. Same circumstances repeat: from battery (perhaps sleep) to plugged in--a reboot occurs.
So something with the charger?
Changed power options to hybrid sleep (instead of sleep) and after 10 days no issues. In hindsight a sleep file problem. Guessing a likely registry issue, bu don't have skills to meddle around; will post back in week to hopefully close case.
Thanks for everyone's help.
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