I am using Windows 7 and testing it.
I have no firewall on it because all I tryed are bugging applications.

I want a Firewall because I want my ping being stable and the fastest it can.
I used Game zone alarm option + blocked Internet option to allow only my FPS game and my VoIP application to go to Internet.
It worked very great on xp ^^.
If you are looking for what you will put on Windows 7 zonealarm 64 bits.

Can you put it again on your futur version or lvl up it, It was great on XP.

P.S. : I am French so don't bother for translation :P

Operating System:Windows XP Pro
Software Version:8.0
Product Name:ZoneAlarm Internet Security Suite