I moved you over to the proper forum.
Here is a KB that may help you.
Manual uninstallation documents for Symantec Endpoint Protection
http://www.symantec.com/business/support/index?page=content&id=TECH96924&locale=en_US
If that fails, you may need the Cleanwipe tool to remove the product completely. You will need to open a support case to get the tool.
Best,
Thomas