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Comodo Internet Security Software Free Download

COMODO Internet Security is an antivirus system that aims to protect your system, files, and folders against online threats. It includes an antivirus module, combined with firewall features build an unbreakable shield.

This free Internet Security software offers to change your DNS servers to COMODO SecureDNS servers (it has a description) and to enable “Cloud-Based Behavior Analysis” of unrecognized programs by submitting them to COMODO.

When the program is launched, you are welcomed by three windows. In one of them, COMODO searched for updates, another one informed us of how the firewall had detected a new private network that our PC was about to join and another one which is the software’s interface.

Updating takes several minutes, after which COMODO runs an automatic scan on your computer (which takes a really long time, but it’s thorough). The GUI is very eye-catching and simple to follow.


COMODO seems to have a lot of features for each main function, but they are well organized. The antivirus section lets you run or schedule a scan (a full scan, on critical areas, or a spyware scan), configure the scanner settings, view antivirus events, and quarantined items, but also submit suspicious files to COMODO to be further analyzed.


The firewall lets you view events and alerts that were possibly triggered by attacks on the computer, define a new trusted or blocked application, create a set of global rules, and configure various options.

Defense+ has some interesting features, such as running a program in the Sandbox (a “safe haven” for untrusted, restricted, limited, or partially limited applications), adding or removing files to and from your local safe executable database, and viewing unrecognized files (which are automatically placed in the Sandbox until further notice).

Surprisingly enough, COMODO uses very little CPU and memory resources while scanning is active. But other system applications run slower.

To sum things up, COMODO Internet Security Program is a brilliant security application, but that’s only our opinion. You have to test it for yourself.

Features of Comodo Internet Security


Known and listed PC-safe files and applications are easily identified and able to access your PC.


Firewall and Antivirus combine to stop viruses and malware before they enter the PC.


Spyware Scanner detects and cleans malware infections in PC registry and disks.


The sandbox is a virtual operating environment for untrusted programs — ensuring viruses and other malicious software are completely isolated from the rest of your computer.


Total security for online shopping and banking. Features browser isolation, keylogger prevention, copy-paste protection, screen capture blocking and SSL certificate inspection.


Cloud based antivirus scanning detects malicious files even if a user does not have up-to-date virus definitions.


Cloud based behavior analysis system detects zero-day malware INSTANTLY.


Cloud based whitelisting of trusted publishers easily identifies a safe file and vendor.


Keeps you safe online by automatically blocking dangerous websites and allows you to set up custom block lists for different members of your family.


List of over two million known PC-friendly files and applications so safe files and apps are allowed to run.


Provides users with the ability to lockdown their PC so only known good applications can run.


Firewall quickly learns the rules you set for downloading software, and adjusts its alerts accordingly to fit your needs.


Cloud based antivirus scanning detects malicious file even if a user does not have up-to-date virus definitions.


Make sure your PC is clean with one simple button click.


Quickly navigate through the various parts of Firewall protection without getting lost.


Preset security settings for simple point-and-click setup.[/vc_column_text][/vc_tta_section]

Comodo Internet Security FAQs

What makes Internet Security better than my current Antivirus and Firewall combo?

Internet Security is a security suite plus. More than just an antivirus program, it also includes an award-winning firewall, host intrusion prevention, a sandbox for untrusted software, anti-malware and buffer overflow protection to deliver comprehensive protection against today’s diverse range of threats.

What makes Comodo’s Internet Security product different from the others?

It’s simple: prevention-based, Default Deny Protection. It works by only allowing trusted files to run on your system. Files that are not trusted are run inside the new sandbox

What is the sandbox and how does it protect me?

The sandbox is a virtual operating environment created within your computer for unknown and untrusted programs. Internet Security automatically runs untrusted programs in the sandbox where they cannot make changes to processes, programs or data on your ‘real’ system. This protection goes well beyond traditional Antivirus software by ensuring any brand new viruses are completely isolated and cannot cause damage.

Will programs run OK in the Sandbox?

Yes. Applications in the sandbox are run under a carefully selected set of privileges and will write to a virtual file system and registry instead of the real system. This means untrusted (but harmless) applications have the freedom to operate as usual while malicious programs are prevented from accessing or infecting your computer. This provides smoothest and most secure user experience possible.

Do programs stay in the Sandbox forever?

No — the sandbox is the first part of a trust decision engine. After an unknown application has been placed in the sandbox, Internet Security will also automatically queue it for submission to Comodo labs where it will be analyzed by our technicians. If it is found to be harmless then it will be added to the global safe list that will be downloaded by all Internet Security users in the next round of updates. Once it is added to the safe list, the application will no longer be run in the sandbox by Internet Security. If it is found to be malicious then it will be added to Comodo’s list of malware signatures and will be deleted after the next round of updates.


Secure Shopping

Comodo Secure Shopping is a major new feature in CIS which provides unbeatable security for online banking and shopping sessions. When using Secure Shopping, websites will open inside a security-hardened virtual environment which is isolated from the rest of your computer. This creates a threat resistant tunnel between you and your target website which cannot be monitored or attacked by any other processes running on your computer.

  • Hides sensitive online data from other processes on your PC
  • Prevents keyloggers from recording your keystrokes
  • Warns you if there is a remote connection to your computer
  • Stops hackers and malware taking screenshots of your session
  • Detects fake SSL certificates to stop man-in-the-middle attacks

But Secure Shopping isn’t just for the internet! You can run any application which handles sensitive information inside the secure environment. Examples include:

  • Email applications like Outlook and Thunderbird
  • Accounting software like Sage
  • Password managers
  • Spreadsheet software like Excel
  • FTP and VPN clients
  • Instant messaging and chat applications
  • File sharing clients like Drop Box

Applications inside the secure environment are totally sealed-off from other processes on your computer – meaning there is no way that malware can gain access to your data.

The technology behind Comodo Secure Shopping is already being used by major point-of-sale and money-wiring organizations to secure sensitive customer transactions. With CIS, Comodo brings this same level of security to your home. If you need a truly secure place to work and go online, then use Comodo Secure Shopping.

Technical Specification

File Size 5.44 MB
Languages English
License Free Trial
Developer Comodo Cybersecurity



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