Best Free Firewall software for Windows 10/8/7

The importance of a firewall cannot be over-emphasized. A Firewall can block threats that your Antivirus may miss. Not only that, it can prevent hackers from breaking into your computer! The inbuilt Windows firewall is great – and just good enough for the regular home user who wants protection and who does not want to be bothered with setting it up. Leaving the default values for your Windows firewall should suffice, and along with a good antivirus software, give you ample protection for your Windows computer. But if you want an easy UI that will help you configure the Windows Firewall, you could check out Windows Firewall Control,  Windows Firewall Control, and Windows Firewall Notifier.

Free Firewall software for Windows

However, if you are looking for a third-party firewall for your computer, there are several free solutions available. Let us check out some free stand-alone firewall software for your Windows PC.

Comodo Free Firewall

These days, the feature-rich and easy-to-use Comodo Free Firewall has become very popular. It promises to stealth your computer’s ports against hackers and will also block malicious software from transmitting your confidential data over the Internet. The Comodo Free Firewall will monitor all aspects of communications between your computer and the Internet. This prevents common hacking methods such as port scanning. The firewall references a list of over two million known PC-friendly applications. If a file is not on this ‘safe-list’, the Firewall immediately alerts you to the possibility of attacking malware.

ZoneAlarm Free Firewall

ZoneAlarm Free Firewall at one point of time was the most popular third-party firewall for Windows – but over time some started getting the feeling that it had become too bloated. It is nevertheless still the world’s most downloaded firewall software.  The firewall is very easy to configure and for an average user, its settings are best left at default. It is very effective in stopping Internet attacks at the front door and even catches thieves on their way out. Its 2-way firewall proactively protects against inbound and outbound attacks while making you invisible to hackers. There are still many today who swear by it.

Emsisoft Online Armor Free Firewall

Online Armor Free Firewall helps stop Hackers, stops Malicious Programs and protects your Identity. It offers the following protection: Kernel Mode Security, Web Shield File/Registry Shield, Phishing Filter, Execution Protection, Termination Protection Limited Autostart Protection, Keylogger Detection, Tamper Protection, DNS Spoofing Protection and Script/Worm Protection. The free version offers lesser features as compared to its paid premium offering – but if its basic inbound-outbound protection you are looking for, this firewall serves the purpose.


There are ways you can configure the Windows firewall using some third-party tool. TinyWall is freeware that further hardens the advanced firewall of Windows 7. It is a light-weight solution with negligible performance impact and lets you work without giving out any pop-ups whatsoever. No additional drivers or kernel components are installed with it. TinyWall will give your Windows Firewall a secure configuration and present you with a simple interface where you can easily define what has network access and what not. It will also allow you to easily prevent other programs from modifying or overwriting your firewall settings.  If you are looking for a very basic and simple solution, you might want to consider using this firewall.


PrivateFirewall is a proactive, multi-layered defense solution for Windows desktops and servers. It detects blocks and quarantines activity characteristic of known malware, hacking, phishing and other threat types. Its packet inspection, URL filtering, anti-logger, process monitor, and application/system behavior modeling and anomaly detection components stop hackers, spyware, viruses and other forms of malware before they can cause damage. It is a 3.5MB download. (Updated thanks to Samit).

Also check out: Sophos UTM Essential Network Firewall Free | Free Firewall | Sophos XG Firewall Home Edition.

Do you use any third-party firewall on your Windows, and if so which one? Which firewall would you like to recommend? We’d love to hear this.

Yesterday, we read about the difference between hardware firewall and software firewalls. In a few days, we will show you ways to test your firewall software, for free, and find out how well it is protecting your computer.

Go here if you are looking for free Internet Security Suite software for your Windows computer.

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Anand Khanse is the Admin of, a 10-year Microsoft MVP Awardee in Windows (2006-16) & a Windows Insider MVP. Please read the entire post & the comments first, create a System Restore Point before making any changes to your system & be careful about any 3rd-party offers while installing freeware.


  1. Samit Tandukar

    Personally i use Online Armor Free and i think Comodo firewall and Online Armor are the two best out there…..both of them have strong HIPS…..

    Ashampoo firewall is discontinued product, it doesn’t support windows 7 at all and you forgot two great free firewalls…..Privatefirewall and Outpost free firewall…..although you can’t get separate setup file for outpost firewall free….you need to install outpost security suite and disable Antimalware component during install….

  2. Thanks for the inputs Samit. Replaced Ashampoo with PrivateFirewall, which I was not aware of.

    I have included only the standalone firewalls, hence did not include Outpost here. But yes – Outpost Security Suite does have a great firewall. You can read more about it here:

  3. Manov rao

    Yup me too agree with this Comodo firewall is really awesome it is compatible with all kind of antivirus, just view the below link,

  4. guest

    Comodo firewall is the bomb, very light on the system not a resource hog and runs great with Eset Av. Defo the best.

  5. Dan

    I found this thread REALLY late, but I’d like to mention re Privatefirewall. My Windows 7 Home Premium SP1 64 bit has issues with a Comodo FW kernel access driver (random BSODs); earlier in 2013, I checked 10/2012 Matousec report on FWs, found Comodo #1 and Privatefirewall #2; tried and have kept using Privatefirewall without OS/AV issues…but at each startup/restart, Privatefirewall (on its own untouchably set autorun) would cause a long blackish-screen hang between “Starting Windows” and LogIn screen, then take some time to load itself after logon. Recently I used Performance troubleshooter to not have Privatefirewall run startup; no change to hangs. So I went to “Start” menu, right-clicked “All Programs” to open startup folder, copied Privatewall icon into same so as to at least not forget to use it, and now every time my OS starts/restarts with no such hangs and Privatefirewall working as it should…a pleasant surprise for once.

    There are a very few types of malware Privatewall doesn’t protect against, but most competent AVs do; also, one needs a good antilogger (such as Zemana) as this FW doesn’t faze loggers. For those interested, my Privatefirewall on highest settings itself alone scores 290/330 current Comodo Leak Test…almost twice what my resident Windows firewall scored. Hope this is of use to at least some windows users.

  6. jorge correa

    Did you know that Windows 7 built in firewall is actually one of the best in protecting your PC??? Read this review on Wins 7 Firewall >>>>> <<<<<< Read this review…..

  7. Clabu

    I use Online armor premium for a few years now and i can say i am very happy with its performance together with Kaspersky antivirus ( not the internet security bundle ) together they are a deadly combo to protect my pc’s

  8. PatSG

    Dan: “at each startup/restart, Privatefirewall (on its own untouchably set autorun) would cause a long blackish-screen hang between “Starting Windows” and LogIn screen”

    So your solution was to remove Privatefirewall from startup ? How is the situation now ?

    In Feb 2015, I installed PrivateFW (latest-available version, released in Dec 2013) for the first time. But upon reboot & login, I kept getting a black screen with just a mouse pointer.

    Task Manager (CTRL+SHIFT+ESC) indicated that kernel.sys was hogging 25% of the CPU, while the majority of system processes were not even loaded. (The Task Manager listed very few processes, even less than in Safe Mode). Furthermore, there are no 3rd-party software that start up with my system, so it can’t have been conflict with these.

    Repeated reboots resulted in the same black screen immediately after login. The “solution” is to boot into Safe Mode (… apparently PrivateFW does not start up with Windows in Safe Mode, Task Manager listed 0 PrivateFW processes), upon which I performed System Restore. My OS is the same as yours: Win 7 SP1 Home Premium (64-bit).

    Incidentally, Privatefirewall seems quite famous for causing a black screen at start (or login after logout) for many Windows 7/8 users since 2011/12. Some of them are Avast Antivirus users, but I have never installed Avast. In fact, when I installed PrivateFW, my system had no antivirus program because I’d cleanly uninstalled the previous one & rebooted a few times, before installing PrivateFW.

    Until now, PrivateFW;s developer has neither resolved this, nor mentioned this issue at the Support page. Moreover, this “highly recommended” firewall has received hardly any
    updates as of Jun 2012. There were 2 minor updates in 2013, & none since

    I am keen to try Privatefirewall, but considering the lack of updates & the numerous black-screen complaints(totally left unaddressed by the developer), my reservations are not unjustified. In comparison, I have not encountered similar black-screen problem with Comodo Firewall or ZoneAlarm Firewall.

    “my computer would black screen after a minute but uninstalling private firewall fixed it”

    Windows 7: Private Firewall, install BSOD

    User A: “Installed it rebooted, and that was it! the whole system froze stone cold with just a blank GUI on my desktop”
    User B: “so many people on this site praise this [PrivateFW], but I also had weird effects right after installing”

    Avast Free + PrivateFirewall= black screen at start
    User A: “your desktop screen remain black and you can only force restart 2 or 3
    times untill desktop is showed. Sometimes screen is black but you can
    see mouse arrow”
    User B:Same problem here. Don’t have to reboot, just Ctrl-Alt-Del, logout and then login again [to get black screen]”

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