2
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters](time) "Type"="NoSync"(off) "Type"="NTP" (on)
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\tzautoupdate](time zone) "Start"=dword:00000003 (on) "Start"=dword:00000004 (off)
I also found how how to do this using a tool called Process Monitor. I followed instructions at this web page: http://www.howtogeek.com/school/sysinternals-pro/lesson5/all/
– None – 2016-05-12T06:58:57.130The values for the "Start" DWord are backwards. 3="Automatically Set Time Zone" and 4="Manually Set Time Zone" (at least as of Windows 10 v1703; just confirmed on several PCs) – Ruscal – 2017-06-29T13:39:50.970