COMODO Internet Security


COMODO Internet Security offers 360° protection against internal and external threats by combining a powerful Antivirus protection, an enterprise class packet filtering firewall, and an advanced host intrusion prevention system called Defense+.

COMODO Internet Security the power of COMODO’s award-winning Firewall and AntiVirus software to protect your PC from malicious software and Hackers. Best of all is FREE! COMODO Internet Security will help you detect and remove viruses, Trojans, and other malicious software and hackers, and keep them out of your computer. In one easy-to-use bundle that won’t slow down your computer.

COMODO Internet Security sees a major leap forward in security and usability with the addition of the new sandbox feature – an isolated operating environment for unknown applications. Under default settings, unknown applications are now automatically sandboxed so that they cannot make permanent changes to other processes, programs or data on your ‘real’ system.

Comodo Internet Security Features:

  • Antivirus – The proactive antivirus system that automatically detects and eliminates viruses, Worms and Trojan horses.
  • Firewall – The Firewall that constantly defends your system from inbound and outbound Internet attacks with a highly effective packet filtering firewall.
  • Defense+ – A rules based intrusion prevention system that protects your critical operating system files from malicious processes, internal attacks and blocks unknown malware before it ever gets a chance to install. Defense+ now features automated sandboxing of unknown applications. The sandbox ensures untrusted (but harmless) applications are allowed freedom to operate whilst untrusted (and genuinely malicious) applications are prevented from accessing or infecting your computer. Now includes the revolutionary sandbox feature.

Comodo Internet Security alerts you whenever potential malware attempts to attack or gain access to your system. The alerts are displayed as pop-ups at the right hand corner of your screen and allow you to allow or block the unrecognized activities, processes and connection attempts of running applications (CIS now even protects against ‘drive-by-download’ buffer overflow attacks.) Apart from expert advice in the form of ‘Security Considerations’, each alert now also features the innovative ‘Threatcast’ feature to help users arrive at an informed decision on how to react to the alert. The Threatcast system allows users to share their responses among the community of millions of CIS users worldwide. Whenever an alert appears, it contains a report of how other users have responded to the same alert. The report provides an additional guidance to even inexperienced users on making a decision to respond to the alert.

Comodo Antivirus leverages multiple technologies, including Real-time/On-Access Scanning, On Demand Scanning and a fully featured Scan Scheduler to immediately start cleaning or quarantining suspicious files from your hard drives, shared disks, emails, downloads and system memory. The application also allows users to create custom scan profiles which can be re-used across all scan types and features full event logging, quarantine and file submission facilities. Comodo Antivirus detects and removes threats that are present on your machine and forms an additional layer of security on top of the threat prevention offered by the Firewall and Defense+ components. The heuristics scanning capability  of  the application identifies previously unknown viruses and Trojans.

The Firewall component of COMODO Internet Security (hereafter known simply as Comodo Firewall) offers the highest levels of security against inbound and outbound threats, stealths your computer’s ports against hackers and blocks malicious software from transmitting your confidential data over the Internet. Comodo Firewall makes it easy for you to specify exactly which applications are allowed to connect to the Internet and immediately warns you when there is suspicious activity. The Firewall Task Center allows you to quickly and easily configure all aspects of the Firewall.

Advanced Features:

  • Install the Antivirus as a standalone
  • Install the Firewall as a standalone
  • Install both Firewall and Antivirus

Operating systems: Windows XP, Vista, Windows 7, Windows 8/8.1, Windows 10.

Changes in COMODO Internet Security – April 29, 2016:

Homepage –

Size: 221 MB

Download COMODO Internet Security 8 Freeware

Download COMODO Internet Security 9 Beta x86

Download COMODO Internet Security 9 Beta x64

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11 Comments on "COMODO Internet Security"

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2010-01-11 02:31

The best free internet security suite.

The firewall and the HIPS (or Defense+ as Comodo names it) are top quality and the antivirus engine is descent (for a free one that is) but it needs more work, because in my experience I got some false alarms from the antivirus like detecting games and other programs as viruses (Guild Wars, Still Life, Pinnacle Game Profiler) other than that its OK.

2010-03-24 23:47

I didn’t say something’s wrong with KIS, I said due to my preferences I would go for CIS Firewall, as I personally don’t like “suites”.

You can check matousec website for best firewalls comparison, and you’ll see KIS is rated pretty high, although a bit below CIS 🙂


2010-03-25 14:51

Among products tested against 84 tests, Comodo Internet Security 3.12.111745.560 and PC Tools Firewall Plus lead the challenge with the perfect 100% score. Online Armor Premium is close to them with 99% score, closely followed by Kaspersky Internet Security 2010 with 96 %. The Excellent protection level has been also reached by Outpost Firewall Free 2009 6.5.2724.381.0687.328 with 93 %, Outpost Security Suite Pro 2009 with 92 % and Online Armor Personal Firewall Free.

2010-06-23 12:17

I will try this one, since Avira Premium Security started to crash. I`m satisfied so far. No computer overload and the firewall looks like working very well. Just did the grc test. I`m completely invissible on the Internet.

2010-08-07 09:32

I’ve used Comodo for several years now and never had an issue with it… and it turned out to be the only product I could configure to give me a ‘Perfect’ stealth reading after testing several other renowned products.

2011-02-09 23:21

Very good firewall (And free)

2011-02-28 14:07

Totally agree that it’s the best security in gathering AV and IS softwares but tell me that if this version absolutely free as like as the COMODO Internet Security Premium edition ?

2011-05-06 11:23

About the free 1 year promotion of CIS PRO. It doesn’t have TrustConnect. The only difference is Geekbuddy and Live PC Support which are useless for me. Why call it PRO if it’s the same as the FREE version?

The software rocks especially the firewall, the anti-virus engine had major improvements but in my experience it slowed down my system a bit. So I’m just using the firewall with another anti-virus.

2011-05-16 16:52

Here is the official link to get legal Comodo Internet Security 6 pro version for free(1 year)

2011-10-21 20:39
i was pissed with that kaspersky internet security 2012,,even it clean the virus the pop-up windows of virus warning always up there,,and when asked abt this they(kas team) said re-install kis again or else they will say urs operating system is corrupt..and when you uninstall kis then be ready for more headache,bloody it screw up my registry entries,search option was gone, WMP showeing error…after i register my all .dll files everything got normal.Just check the kaspersky forum so much of problem people faceing,and they have only one answer re-install or format urs pc.. wat a crap.huuu bye bye boreing slow… Read more »
2011-12-20 11:04

this is prithvi (as my old account not working here)
so in above comment what ever i said abt comodo intenet security regrading its merits..i take it back… this antivirus is ok not so good..Its scanning way is really makes urs pc slow..bad antivirus

Best is microsoft security essential