It is considered a best practice to use the application publishers own recommended uninstaller & utility when attempting to totally uninstall a security application, such as an Anti-Virus program. This article lists the most commonly available uninstall tools for you to match your particular needs.
Uninstall/Removal tools for common antivirus/security software It will also link to some of the Uninstaller software that is in common usage.
This article provides links to 3rd party company websites and their own uninstaller tools.
