I had Norton on my laptop and after a certain period after it expired and I was getting pop-ups every couple of minutes from it.
Couldn't remove it from the add/remove (as it isn't all listed there) so had to download a program to remove it then decided to go AVG free which so far so good.
I have McFee on my desktop which, every time I start, pops up a box about renewal. This seems to be because after the trial period I purchased a lesser version.