ZoneAlarm is not great as a firewall for attacks from the outside. What is does help with is alerting you to network activity originating from within (ie. a virus). The simplest way to remain secure on broadband as a consumer if you're not behind hardware protection is to keep up to date with security patches (make it a weekly activity to use the Windows Update site), be careful about downloading and running applications (since it's far easier for someone to trick you into compromising you system than to attack it from outside), and to use a virus scanner. Kazaa is rife with viruses and I find roughly 2 in 3 programs downloaded with it is infected, so... Don't use P2P without anti-virus software