Kerio Personal Firewall

You can obtain Kerio from their website and it is free for home use.

In my humble opinion Kerio is the "best of breed" as far as software firewalls for Windows go. There are a couple of major selling points for me

How I setup Kerio on my Windows boxen is detailed in my How-To Get The Best Out Of Kerio Personal Firewall pages.

while I put the finishing touches to the How-To pages you can still download the Word doc and look at all the gory details. Kerio How-To.doc