It's probly just random... A lot of those internet secruity things will block things (and notify) you of simple things like a ping request.
I like my corporate software... I'm authorized to use either Symantec Corporate or McAfee Enterprise on my home computer (any DoD employee is).
I like these corporate AV/Firewalls way better than consumer stuff. I just want it to do it's job and block stuff w/o bothering me (unless something happens, of course).
My favorite consumer choice is Trend Micro's internet security suite... doesn't bother you a whole lot like Norton or consumer McAfee.
I really can't stand those firewalls that ask you EVERY time if you want to allow a program to connect to the internet (hello ZoneAlarm!). Even after you select the box and say it's ok for every program you use, it will notify you of the slightest change (like if you update, all bets off).
Recently, Windows Defender has been bugging me... it's always asking me to review some things it came up with. I liked the old MSAS that would just list it when you opened the program.
I also like Sophos AV, but good luck with that since you have to subscribe to get it.
