Unauthorized access blocked? Monitoring 1383 signatures? Am I under attack? Help!

According to the history tab on my NAV 09, it has been blocking “Unauthorized access” (6 times in the past 2 days).  It says the actor is Internet Explorer, which I hardly use, and the warnings come up even when I’m not using it, and the targets have been a few different Norton files.  Also, it tells me “Intrusion Protection Activated”, and that is is monitoring 1383 signatures…    No trojans or anything come up on a full scan OR a full MBAM scan.  Why is this happening?  Is someone somehow trying to seize my computer?  Help me please!