group policy client service is stopped

Symptons include the Settings > Update and Security Window freezes with a blank pane, and then disappears after a while (the time before disappearance varies.)
Right clicks in File manager or any file related activity has long hang time, or may not recover.
Chrome may fail to start, or start after 5 minutes or so.
Reverting to an old restore point will sometimes remedy the situation for a limited time. Installing a new Windows update will generally cause it to reappear.

Other critical data:
Other users suffering from related Group Policy Client Services problems have found that gpsvc is missing in the registry HKey_Local_Machine > System > CurrentControlSet > Services > gpsvc. This is present in my machine and it matches the values found on Eugene Robertus's excellent YouTube video on the problem which can be found at Windows could not connect to Group Policy Client services fix for Windows 8.1 64-bit - YouTube. Note that this video was made for Windows 8.1.

Another registry issue is a missing or corrupted value in HKey_Local_Machine >Software > Microsoft > WindowsNT > CurrentVersion > SvcHost > netsvcs. My registry includes a value for gpsvc underneath lanmanserver in the netsvcs entry.

Does anyone have any ideas about what could lead to gpsvc stopping?

Additional poking around reveals that gpsvc depends on other system components to run successfully. The listed components are Mup and Remote Proceedure Call (RPC.) RPC has branches to DCOM Server Process Launcher, and to RPC Endpoint Launcher.
Neither of these shows up in Services, either running or stopped.
It seems that RPC usually results in people being unable to open photo viewers when it isn't running. I can open photo viewers.
How can I tell if either Mup or RPC is running correctly?
Thanks for any bit of help.