Comodo Firewall Pro

Comodo Firewall Pro

If you have Windows XP or Windows Vista, you have a firewall on your PC courtesy of Microsoft, so you may figure that you're perfectly safe. Wrong--the firewalls built into both of those operating systems have problems. The Windows XP firewall, for example, lacks outbound protection. And the Windows Vista firewall is exceedingly difficult to customize.

A great bet for a truly flameproof firewall is the free Comodo Firewall. It offers great protection against both inbound and outbound threats, along with some very nice extras. Its Defense+ feature, for example, locks down particularly vulnerable files and folders so that nothing can alter them.

If you use this firewall, you will have to spend a bit of time training it. Whenever an application tries to access the Internet from your PC, you'll get a pop-up that asks you whether you want to allow the application to proceed. If you'd like to cut down on the training time and the number of interruptions, use the program's Clean PC mode. In this mode, Comodo scans your PC for applications and registers them as safe. Afterward, you won't see as many alerts.

Among Comodo's other nice extras is an install mode that shuts off the firewall for 15 minutes, so you can install a new application without getting inundated with alerts.

Download Comodo Firewall Pro | Price: Free