ZoneAlarm Antivirus 2013 is a package of firewall and security products developed by CheckPoint Software Technologies to provide security for home and small business computers against spyware, viruses, malwares, identity theft, and hackers. The antivirus engine in each ZoneAlarm security product is equipped with an inbound intrusion detection system and the capability to control the program used in creating outbound connections. The ZoneAlarm Antivirus 2013 package includes ZoneAlarm PRO Firewall 2013 for protection against hackers, ZoneAlarm PRO Antivirus + Firewall 2013 with added protection against spyware and viruses, and ZoneAlarm Extreme Security 2013 which contains computer optimization and back-up tools in addition to security against hackers and spyware. A fourth package called ZoneAlarm Internet Security Suite contains all the features of every product plus additional IM security, an anti-spam filter engine, and a parental control. ZoneAlarm security products support operating system software that include Windows7, Vista, and XP, internet Explorer, and Firefox