@ Bijay
All I can say in this case is "may GOD only help you".
You can't expect so much from Symantec!
Has Symantec provided you the broadband connections > NO
Has Symantec made the OS that you run > NO
Is Symantec responsible for patching your systems > NO - Microsoft made the WSUS LOB app free so that everyone can patch their systems centrally.
Is Symantec responsible for defining a Security Policy for your organization > NO
Is Symantec responsible for your IT policy to define that you should have a Domain env. for simplified and centralized Management > NO
As you can see, since all 5 options above have a NO answer, I really think you are expecting too much. Symantec makes software that'll HELP YOU to prevent KNOWN variants and traces of Malware of protecting your systems. Symantec strives and does provide the best support and the signatures to identify and remove new variants / new threats from systems. To remove them, YOU need to be MORE PROACTIVE.
You need to educate your users to stop surfing pr0n websites (if they do, apolgies if they don't) and tell them that what they are doing is Punishable under the Indian IT Act with Rigorous Imprisonment of UPTO 10 years, and a fine of Rs. 1 crore only. ;) Pretty decent amount I think. ;)
Also, you'll need to get things in order and define a proper IT policy for your organization, such as getting a firewal, may it be hardware / software and chanelling all your broadband connectiosn thru it hence filtering out unwanted stuff and EXE / CPM / BAT / DLL / etc. kinds of files.
I'm harping on this since this is THE absolute essential requirement for any organization in today's worldt o have a properly formulated and working IT and Info Sec policy. Or would you prefer that some employee(s) unwittingly introduces a worm in your env. and wrecks all the stuff thats working?!
Lets be very realistic adn practical, Symantec is NOT responsible for any Non Compliance issues at your IT end. If you want to tie up loose ends, use the Application / Device Control to block all USB drives and USB disks, and rsetict user browsing by creating a Firewall policy and block search / domains based on specific keyworks.
HTH.