Im trying to run norton removal BUT!!!

 I had norton internet security installed and it worked great the whole year. Then I installed the Norton Utilities 15.0 Trial version to see how good a job it does. After both programs expired I uninstalled them and tried to run the norton removal tool but it says Norton utilities is still installed and cant continue. what do I do?  I know NU is uninstalled so why wont the removal tool work?