Iria

ZoneAlarm makes it easy. Unlike other personal firewalls, ZoneAlarm protects automatically from the moment it's installed - no programming required. ZoneAlarm barricades your PC with immediate and complete port blocking. And, then runs in Stealth Mode to make your PC invisible on the Internet - if you can't be seen, you can't be attacked.

ZoneAlarm delivers simplicity without compromising your security. A getting started tutorial explains controls and alerts to get you up and running quickly. And, to keep you confident that you're always protected, intuitive color-coded alerts rate security risks - in real time.

For basic, "no frills" firewall protection, ZoneAlarm® is the popular first step for many home PC users. And it's still FREE* for individual & non-profit use.

Editors Note: The new 7 version of Zone Alarm free includes Zone Alarm Security Suite, which explains why the free version is larger then most of the other versions. You do not have to install it and it now has some minor nag screens, at least on first install.
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Source / Download: Majorgeeks
Freeware

M0nk3m4n

Freakin' awesome, I have this so no need to download but eh, still great to see a post about it.IT WORKS WONDERS!

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Hello World!Gimme a sammich!
Main rig's other specs: (Like besides the ones the site asks ya for)
Case:CoolerMaster WaveMaster Case, Soundcard:Creative SBLive! Value 5.1, Microsoft Comfort Curve Keyboard v1.0.(A bitch for typos!)
Logitech Optical USB Wheel Mouse.(Snazzy!), Logitech Z-5500 THX Surround DTS 24/96 Speakers (505 Watt RMS, 1010 Total)(Rumbly!!)