UNwanted popups from NORTON

There is a popup that keeps coming up FROM NORTON trying to sell a subscription from lifelock.  normally this would just be annoying, but you cannot close this popup, not even from the task manager.  the only way to get rid of it is a full system restart!

let me just say that this is unacceptable, that I don't want my system hijacked by Norton's marketing attempts.  this kind of sales tactic needs to be eliminate or you will lose a customer!

Not sure, you would think the Norton CSR who had control over my system for 15 minutes would have done that.  Its came up 3 times now and only a restart removes it from my desktop.

If you go to Settings > Administrative Settings > scroll down to Special Offer Notifications, then disable that > Apply and restart, does that stop the pop up?