If you find yourself needing to uninstall Symantec AntiVirus and you don’t know the password…. or perhaps you want to script an uninstall (which you can specificy a password on the command line) there is a way.
Just modify this key:
and set "useVPuninstallpassword"="0"
You don’t need to reboot. Once you make this change will be be able to uninstall Symantec Antivirus without a password. You can even now script the uninstall as it will no longer ask for a password.