How to manually uninstall Symantec Endpoint Protection client from Windows Vista, Windows 7, and Windows 2008 32-bit
http://www.symantec.com/docs/TECH102286
How to manually uninstall Symantec Endpoint Protection client from Windows 2000/ XP/2003
http://www.symantec.com/docs/TECH102261
How to uninstall Symantec Endpoint Protection client from Windows XP and Windows 2003 32-bit and 64-bit operating systems manually
http://www.symantec.com/docs/TECH163585
How to manually uninstall Symantec Endpoint Protection Manager 12.1 on all Windows operating systems
http://www.symantec.com/docs/TECH163684
Manual uninstallation documents for Symantec Endpoint Protection
Incase, you are looking for removal via the CleanWipe Tool, then you could create a Case Online and the Technical Support would provide you with the Tool.
How to update a support case and upload diagnostic files with MySupport
http://www.symantec.com/docs/TECH71023
Create and Manage Support Cases
http://www.symantec.com/business/support/index?page=content&id=HOWTO31091