Test your Antivirus and Firewall.

[Ashwin]

Maybe, I need to make a change, NIS's firewall isn't good enough

which one will you chose to install among these vendors?

Zone alarm
outpost
private firewall
Pctools firewall

I recently dumped NIS, tried Outpost free version on Win XP, but it lacks HIPS, so I switched to Online Armor.

Testing Private Firewall on Win 7.

You can try any one of the above that you mentioned, or Online Armor.