ZoneAlarm Security Feature Comparison Chart FEATURES ZoneAlarm® Internet Security Suite ZoneAlarm® Pro ZoneAlarm® ForceField - Browser Security ZoneAlarm® Antivirus USD 39.95 USD 29.95 USD 19.95 USD 19.95   Basic Network and Program Firewall   Advanced Network and Program Firewall   Improved! Operating System Firewall (OSFirewall™)   Improved! Anti-Spyware   New Engine! Antivirus       Identity Theft Protection     New! Auto-Learn       Spy Site Blocking   Game Mode   Anti-Spam & Anti-Phishing         Email Security   Privacy Protection     Wireless PC Protection   IM Protection         Parental Control         SmartDefense™ Advisor       USD 39.95 USD 29.95 USD 19.95 USD 19.95