Pop ups

I am a long time Norton User.  I'm using Norton Security now.  My subscription is up to date as are my definitions as of right now.  Yet, I still got a popup urging me to update my security definitions.  This seems more like a threat than and inadvertent advertisement.  I'm tired of how intrusive Norton security products are.  Yet, I still want to know why am I getting such an authentic pop up when my Norton Security says everything is up to date.  What's going on?