Hi again.
What about some sort of file analyser, so you can see what files on your computer and in you registry there is in "family". It would be more effective if you should manually clean the registry and a GREAT tool in uninstalling Norton. The uninstall tool don't removes it all. I've seen services and folders on the computers after.
But with this file analyser, you can see what folders and files there is in family with "the file you had choosen".
Sorry for my bad english. I hope it is understandable. :)