After installing the Symantec Endpoint Protection (SEP) client, the client will not start and there is a 1920 error listed in the Windows Event Log.
Windows Application Event Log:
Event ID : Error 1920 (SepMasterService) failed to start
This problem may occur if one or more of the following conditions are true:
Review and apply the appropriate steps listed per the following Microsoft document:
This was seen when upgrading 14.3.7388.000 to 14.3.7419.4000