ZoneAlarm Free Firewall

The ZoneAlarm free firewall provides a basic firewall between your computer and the Internet. A firewall is important, as it blocks open ports on your computer through which a hacker or malicious software might try and enter. If you are not running a built-in Windows firewall, then the free version of ZoneAlarm is a great alternative.

License: Freeware 

Requirements: Windows 

Why you need this software: The ZoneAlarm Free Firewall provides a basic firewall layer between your computer and the outside world.
 

Website: http://www.zonealarm.com/security/en-us/trialpay-za-signup.htm 

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