Personally I have used this firewall protection for years and I personally recommend it as a software solution! It has numerous awards and recommendations by leading magazines, Zone Alarm is available FREE and for non-profit and charitable entities however (excludes educational institutions and governmental entities) a fire wall intended for personal and individual use and will also not cost you a dime.
(Listed On Mon Jan 22 04:45:08 2007)

Listings

Outpost Firewall Free Outpost Firewall Free is exactly that, a free firewall for use on your pc. It offers protection both ways monitoring both incoming and outgoing data and uses very little resources so if you are looking for a simple to use firewall that is free then try out the Outpost Firewall Free which you can download from this site here.
(Voting: 0.00 From 5 On 0 Vote!) Vote! Why? (Date Listed Sun Sep 19 17:45:23 2010)

Personal Firewall Reviews Before downloading a free personal firewall for your laptop or your computer you should take a look at the Top Ten Reviews website where you will find a side by side comparison of the top 10 personal firewall software and a full review of each one making your decision a lot easier.
(Voting: 0.00 From 5 On 0 Vote!) Vote! Why? (Date Listed Sun Sep 19 17:45:23 2010)

Comodo Comodo is one of the best personal firewalls that you can download and use for free. It has won many awards and is the editors choice from PC Magazine. It is also an anti virus program that is also free to use and can be updated regularly although if you prefer to use a different anti virus software you do not have to install the anti virus part and you can just use the firewall.
(Voting: 0.00 From 5 On 0 Vote!) Vote! Why? (Date Listed Tue Sep 15 20:51:43 2009)

PC Tools Firewall Plus Visit this website and you can download their personal firewall and use it for free without any limitations or time limits. It has been designed for Windows 7, Vista and XP so if you are using any of those operating systems and you want a good free firewall then check this one out.
(Voting: 0.00 From 5 On 0 Vote!) Vote! Why? (Date Listed Tue Sep 15 20:51:43 2009)