Hello,
Try using SEPprep utility.
SEPprep: http://www.symantec.com/docs/TECH148513
You may want to try SEPprep utility. Its a competitive product uninstall tool. But it can also be configured to uninstall SEP Client by modifying the following line in the SEPprep.ini file.
RemoveSymantec=Y
You can push this to the clients through GPO (like a logon script) or using a deployment tool.
Check these threads with similar query :
http://www.symantec.com/connect/forums/uninstall-sep-client-remotely
https://www-secure.symantec.com/connect/forums/how...
I would suggest you to check these Articles:
Uninstall SEP client Through GPO
https://www.symantec.com/connect/articles/uninstall-sep-client-through-gpo
Uninstall the Endpoint Protection client using the command prompt
https://support.symantec.com/en_US/article.TECH102470.html
Regards,