Tonight, Internet Explorer, Firefox, Thunderbird, and then AVGs updating program all came up as "trying to act like a server." They have never done this before. If I click deny they do not work. Is this normal behavior? Are they supposed to act as servers? I recently installed spywareblaster and spybot if that makes a difference.

Operating System:Windows Vista Home Basic
Software Version:7.1 (Vista)
Product Name:ZoneAlarm (Free)