I formerly used Windows Defender and Windows Firewall on my Windows 7 laptop but recently upgraded to Norton IS 2011. After installing NIS, I ran GRC shields up and it said my port 554 was open. When I had Windows Firewall on I was completely Stealth, now Norton has opened up one of my ports and I do not know why, or even how to close it. The Norton forums are very non-specific. Am I overreacting? I am annoyed that I spent so much money and now feel less secure. Thanks, from a noobie.