With my SONOS music player system, I have noticed that the GUI in Windows 7 keeps resetting while I am trying to use it.
When I turn off the firewall for BitDefender 2013, the problem goes away so BD is definitely not allowing something to occur with it's ports.
I cannot for the life of me to figure out how to allow particular Sonos ports to pass.
I see that BD automatically created an EXCEPTION for the Sonos EXE file and appears to allow everything, yet it does not.
Thus, still trying to figure out how to allow specific ports to operate in BD 2013.