Agnitum Outpost Firewall Free 2009
System Requirements: Windows 2000, XP, Vista.
Sunbelt Personal Firewall
System Requirements: Windows 2000 Pro, XP and Vista.
Note: Sunbelt Firewall is 30 days trial. If you don't buy, it will become free edition with limitation. See in the said link the limitation of their free edition.
As a friend with an an ancient Dell laptop was on the point of renewing an expensive McAfee subscription, I extolled the virtues of free versions of security software. AVG went on ok, so did Spybot, but I've hit a wall with Zone Alarm. The latest version will not install on Win 2000 and I've had no luck trying earlier versions. Can anyone suggest an alternative firewall that will work with the OS?