The Symantec Protection Engine (SPE) service is not getting started if the SPE service is running with a custom user
While starting the SPE service you can see the error "The Symantec Protection Engine service on the Local computer started then stopped".
Symantec Protection Engine 9.0 and Higher
To run SPE service with a user other than 'SYSTEM', the user needs to have the privileges same as the Administrator.
Provide the Administrator Privileges to the custom user and start the SPE service.