I have the newest AVG internet security software and the AVG firewall is blocking my HP 8500 A909 Wireless Printer. The printer will work with windows firewall on but not when AVG is on. I was able to get my printer to work before on comcast by allowing a certain port but now that we moved to at&t I can't get it to work. I need to know what to do on AVG so my printer works. If someone knows how to fix this I can pm them the windows firewall log when the printer is printing and avg is off.