Are you looking for free and effective firewall software to protect your computer system? You have come to the right place. Below is the list of the Top 5 free firewall for Windows operating system.
1. Zone Alarm Basic Firewall
- Our Rating:

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- Easy to understand user interface; protection against hack attacks and malwares; simple control with visual slide bars making setup a breeze; equipped with online backup and identity protection and anti-phishing protection.
- lack of program to program protection and inability to report any attempted attacks from the web.
- OS: All flavors of Windows including Windows Vista, Windows XP, Windows 7
- Freeware
2. Comodo Firewall
Comodo firewall is again one of the best free firewall solutions that will provide your system a full featured security package similar to that of a paid product. It has topnotch network defense and proactive defense features against malicious attacks. It also allows for flexibility of security control and customization.- Our Rating:

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- Features full and advance security suit with active HIPS or application monitoring called as “Defense +”; provides excellent memory firewall.
- Program installation is a bit intricate for an average user with annoying pop-ups.
- OS: All flavors of Windows including Windows Vista, Windows XP, Windows 7
- Freeware
3. Online Armor Free Firewall
This is yet another FREE firewall that is powerful enough to protect your computer from external exploitations as it prevents hacker attacks, malicious programs and protects your online transactions and identity. It is also easy to install and manage and does not hinder computer performance.- Our Rating:

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- Protects online banking and other transactions online; excellent firewall HIPS
- Inability to consistently remember settings; first run of safety check wizard can be slow; no automatic updates.
- OS: All flavors of Windows including Windows XP, Windows Vista, Windows 7
- Freeware
4. PC Tools Firewall Plus
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- Provides proactive security features, easy installation procedure, and automatic updates
- Not completely equipped with installation training and has only minimal built-in help
- OS: All flavors of Windows including Windows 7, Windows Vista, Windows XP
- Freeware
5. PC Tools Outpost Firewall
The free version of outpost firewall provides flexible protection without complicated usability. It has a user-friendly interface designed specifically for average users with simplified alert messages and flexible HIPS. It also provides automatic updates.- Our Rating:

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- Excellent protection flexibility, simplified messages and proactive security
- Lacks some extra features that the paid version has; designed to cater to average users and might not be very beneficial for advance users.
- OS: All flavors of Windows including Windows 7, Windows Vista, Windows XP
- Freeware