Hi Sandip,
I would recommend to enable insight for symantec trusted & then check.
This is a an explanation taken from www.symantec.com/docs/HOWTO55250:
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Symantec and Community Trusted
This level skips files that are trusted by Symantec and the Symantec Community.
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Symantec Trusted
This level skips only files that are trusted by Symantec.
Symantec Community are all the users of Symantec products. So the files signed by Community as Trusted, are in the category "Community Trusted".
Please keep in mind that the suggested security option is "Symantec Trusted" from Symantec.
Some more links to this explaination:
How Symantec Endpoint Protection uses reputation data to make decisions about files
http://www.symantec.com/docs/HOWTO55275
To know more check this Whitepaper on Symantec Insight on
https://www-secure.symantec.com/connect/downloads/insight-deployment-best-practices-whitepaper
Symantec Download Insight, check this Video:
https://www-secure.symantec.com/connect/videos/symantec-download-insight-symantec-endpoint-protection-121
Hope this helps you!!