Every five minutes an Event ID 15 is generated in the Application Event log by Symantec Endpoint Protection 14.x builds.
Microsoft Windows 10
SEP called a routine to update the product status every 5 min causing Event Viewer to flood with the Event ID 15.
This issue is fixed in Symantec Endpoint Protection 14 RU1 MP2 For information on how to obtain the latest build of Symantec Endpoint Protection, see Download the latest version of Symantec Endpoint Protection.