No anti-virus or anti-spyware product is 100 effective, so ZoneAlarm invented the OS Firewall.
The OS Firewall monitors behaviors within your computer to spot and stop even the most sophisticated new attacks that bypass traditional anti-virus and security suites. New Advanced Access Protection - specifically defeats new, advanced attacks that other firewalls miss. 0-Hour Protection - prevents silent outbreaks from gaining system access even before the threat is known by other security programs. Program Control - restricts programs from malicious activities. Early Boot Protection - Uniquely protects your operating system during start-up.
Allows your PC to run quickly and smoothly.