Free alternative to Norton Security Suite or McAfee Security Internet Security Suite

"avast! Home Edition is now free of charge for HOME users for NON-COMMERCIAL use."

Unlike AVG, this one offers protection in other areas, such as Network (firewall), Instant Messaging and P2P apps.  In my case, it almost seems over-protective at times, where you'll have to change settings to allow certain apps to connect properly to the outer world (as is the case for many firewall apps).  I just wasn't expecting it from an app titled "Free antivirus."

http://www.avast.com/eng/download-avast-home.html