I would like you to run Sylink Monitor to collect the sylink log file for real-time debugging.
Please find the website to download Sylink Monitor tool.
Article URL http://www.symantec.com/docs/TECH103369
Enable Sylink debugging for the Symantec Endpoint Protection 11.x and 12.1 client in the Windows Registry.
Article URL http://www.symantec.com/docs/TECH104758
After you enabled the sylink debugging.
Ran The sylink monitor tool
In order to collect log Stop -Smc service and start Smc- service.
Let the tool run for 10 to 15 minutes.
And attach the log file