Symantec has released a new SONAR Driver update for Symantec Endpoint Protection 14.x and you want to verify whether you are running the new version.
Windows
Symantec Endpoint Protection 14.0 and beyond show the updated driver file version in the user interface as SONAR ENGINE version. By viewing the SONAR definitions date you can confirm it's current. You can view this from within Symantec Endpoint Protection by going to Help > Troubleshooting > Versions.