How do I uninstall Norton Utilites 15? Norton Removal Tool does not work

I would like to uninstall both NIS 2011 and Norton Utilities 15. Windows Vista add/remove programs does not remove either NIS 2011 or Norton Utilities 15. I downloaded the Norton Removal Tool. It says I must first uninstall Norton Utilities 15.This has be going in circles. Please help. Thank you.