Hi there St Anger,
To remove Norton, I would suggest that you go to symantec.com/techsupp/
select home & office (if applicable)>access free online support>complete steps 1,2,&3>then type in the words uninstall
It's very involved, depending on your version is very important on how you remove Norton and Symantec
I personally printed everything pretaining to the removal and the procedures.
You may have to disable McAfee first, and reactivate Norton for removal, I'm not sure
.Make sure you are off line when you remove it, then do a defrag. I hate Norton, it gives me fits.