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Free Personal Firewall and Internet Security Software

These are some of the best personal firewalls and Internet security products and services that are available free for personal use. The following selections were chosen based on the results of independent third-party comparative and individual reviews.

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Best Free Personal Firewalls

Online Armor

ZoneAlarm Free Firewall  

PC Tools Firewall Plus


Comodo Firewall Pro

Agnitum Outpost Firewall



Important Firewall Installation Tips Before installing personal firewall software on a Windows computer, be sure that the firewall built into Windows is turned off. Never use two software firewalls at the same time. Completely uninstall one before installing another. Use the vendor's uninstall utility or if not available, use the Windows add/remove software tool in the control panel.  After you install a firewall, be sure to check it with a service like the Security Space Desktop Audit to make sure that it is configured correctly. Testing your firewall is the only sure way to tell that your computer is really being protected. See our installation page for more information.

Patches, Updates & Service Packs




Hard Disk Backup

Laptop Theft/Loss Recovery & More

  • Adeona is a free Open Source system for tracking the location of a lost or stolen laptop while preserving your privacy. It works with Linux, Mac OS and Windows XP/Vista. ***Not taking new clients presently.
  • LAlarm is free for personal use. Includes alarms for theft, perimeter, inattention, battery, disk, health, panic plus data destruction, data recovery, mobile phone alert, and theft response.


Website & Software Terms & Conditions

  • Anti-EULA -- Try EULAlyzer [say what?], it checks an "end user license agreement" (EULA) before you install software to check for amazing provisions like it's ok to spy on you or to swamp you with ads.
  • See Jumping Through EULA Hoops, Dan Costa, PC Magazine, January 1, 2008, for more information about this important issue.