Personal Firewalls: Norton Personal Firewall 2004; ZoneAlarm Pro 4.0

Symantec's Norton brand gets the triple crown in personal security software this time around, joined only by ZoneAlarm Pro 4.0 in the firewall category.

No surprises in the firewall department: This time ZoneAlarm Pro joins Norton Personal Firewall 2004 for the distinction. Both provide excellent protection, are highly customizable, and work with little fuss. Both also give you a decent ad-blocking feature. Nortons firewall adds protection for specified data, while ZoneAlarm is more tightly integrated.