Award-winning Comodo Firewall and Antivirus protection

Comodo Internet Security

Comodo Internet Security

  -  131 MB  -  Demo
  • Latest Version

    Comodo Internet Security LATEST

  • Review by

    Michael Reynolds

  • Operating System

    Windows 7 / Windows 8 / Windows 10 / Windows 11

  • User Rating

    Click to vote
  • Author / Product

    Comodo Group, Inc / External Link

  • Filename


Comodo Internet Security is the free, multi-layered, security application that offers complete protection from viruses, Trojans, worms, buffer overflows, zero-day attacks, spyware, and hackers. Built from the ground upwards with your security in mind, Comodo Internet Security combines powerful Antivirus protection, an enterprise-class packet filtering firewall, advanced host intrusion prevention, application control and anti-spyware in one supremely powerful application. Download Comodo Internet Security Offline Installer Setup!

The latest version sees a major leap forward in security and usability with the addition of cloud-based virus-scanning and behavior analysis of unrecognized files - making CIS unbeatable at detecting zero-day attacks. Under default settings, unknown and untrusted files are automatically scanned by cloud-based virus scanners then, while the file undergoes behavior analysis on the cloud server, it is run in a sandbox on your local machine so that it cannot modify or affect data on your 'real' system. Put simply, this ground-breaking method of protecting your PC means that only trusted applications are allowed to run on your computer. Malware and untrusted files get nowhere near anything important AND you get to use your computer without interruption from nagging alerts.

Comodo Internet Security also features a friendly graphical user interface; granular configuration options; easily understood and informative alerts; wizard-based detection of trusted zones and much more. The tool delivers enterprise-class protection and can be used out of the box - so even the most inexperienced users will not have to deal with complex configuration issues after installation. The app is available in many different languages and is free for life.

Features and Highlights

Tracks down and destroy any existing malware hiding in a PC.

Detects spyware threats and destroys each infection.

Scan, detect & removes rootkits on your computer.

Bot Protection
Prevents malicious software from turning your PC into a zombie.

Protects critical system files and blocks malware before it installs.

Auto Sandbox Technology™
Runs unknown files in an isolated environment where they can cause no damage.

Memory Firewall
Cutting-edge protection against sophisticated buffer overflow attacks.

Kills malicious processes before they can do harm.

Note: 30 days trial version of Comodo Internet Security Pro. After the trial period, you can enjoy the no-cost version of Comodo Internet Security Premium.

  • Comodo Internet Security Screenshots

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    Comodo Internet Security Screenshot 1
  • Comodo Internet Security Screenshot 2
  • Comodo Internet Security Screenshot 3
  • Comodo Internet Security Screenshot 4
  • Comodo Internet Security Screenshot 5

What's new in this version:

Comodo Internet Security
- Change log not available for this version

Comodo Internet Security
- Change log not available for this version

Comodo Internet Security
- WSL 2 can not work when install CIS
- Solitaire can not run in sandbox
- System restore is restoring the registry issue
- cmdvirth can be stoped
- Support jumbo frames in fw
- Setting allow contained applications access to the clipboard does not work
- Fixed BSOD cased by cmderd on 32 bit OS

Comodo Internet Security
- Change log not available for this version

Comodo Internet Security
- 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
- 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

Comodo Internet Security
- Migrated virtually all HTTP URLs to HTTPs.
- Folder Protection

- Upgrade over install doesn't work
- Https website filtering no longer works on Chrome 78
- Chrome crashes in Containment
- CIS creates error while unplugging USB
- Uninstallation & Installation failed
- Uninstallation of Comodo KillSwitch and Cleaning Essentials
- Freezes in Win10 build 1909/1903

Comodo Internet Security
- Preventing unsigned DLLs from loading into CIS processes

- Due to popular demand added the ability to delete vendor rated by Comodo from Vendor List
- Added Czech language translations
- Add 'Windows Operating System' application to 'Windows System Applications' file group
- An alert is now shown that reboot is required if Clipboard Protection settings are changed

Comodo Internet Security
- Added support of Chrome 76 for web-filtering

- Vulnerabilities reported by Tenable
- Crashes of cavwp.exe
- Please note, this release has been rolled out for new users
- We shall be rolling out updates for existing users over the next few weeks

Comodo Internet Security
- This version will no longer updated on Windows XP and Windows Vista essentially making it the last supported version for those OSes. This is due to SHA1 deprecation. Future versions will also have a minimum system requirement on Windows 7 of Service Pack 1

- Dumps of cmdinstall appears after installation on Windows 7
- WMI errors are present in Windows Event Log
- Number of unrecognized files in the CIS widget is not recalculated after system reboot

Comodo Internet Security
- Added ability to remove vendors rated by Comodo from Vendor List

- The issue where system becomes unresponsive with specific viruscope settings
- The issue where non PE files cannot be submitted by 'Submit Files'
- The issue where user rating was not applied in 'Vendor List' for vendor with name starts with space

Comodo Internet Security
- Full Microsoft Redstone 5 Support
- Long path and case sensitive filenames support
- ELAM protection
- Extended Containment Rule "Created By" criteria with "Rating" attribute
- Extended sanbox rules with a vendor as a criteria
- Extended Vendor List with User rating
- "Heuristic Command-Line Analysis" and "Embedded Code Detection" for scanning and monitoring of auto-run entries
- Powershell_ise analysis support
- Option to automatically scan plugged-in devices
- Simplified installation
- First network zone detection is performed in background
- Widget is hidden by default but can be changed with an install setting available through the Options button
- Updated AV engine
- Overall performance and stability improvements
- WDSC integration performance and stability improvements

- Fixed extended OS boot time in some cases
- Fixed defect where full scan fails in some rare cases
- Unrecognized file does not launch in Sandbox second time after first viruscope detection
- Defect where 'Cmdagent.exe' consumes 40-50 % CPU constantly in some cases
- Rules for Website Filtering can't be added if all rules was deleted
- Uninstall of CIS Premium is periodically failed
- cmdagent.exe unexpectedly terminates in some rare cases
- Defect where cmdagent.exe unexpectedly terminates after install CIS with Secure Shopping on XP
- Sandboxed .bat scripts are displayed as cmd in active processes list
- Containment resetting process takes a long time in some cases
- Not able to play videos in Facebook inside sandboxed Opera
- BSOD when playing Freeridesgames games
- This release has be rolled out for new users. We shall be rolling out updates for existing users over the next few weeks

Comodo Internet Security
- Change log not available for this version

Comodo Internet Security
- Fixed high CPU utilization in some rear cases

Comodo Internet Security
- Defect where Comodo Internet Security failed to start on systems where Internet Explorer is not present
- Defect where an abnormal termination occurred in Comodo Virtual Desktop on systems running Windows 10 RS5

Comodo Internet Security
- Change log not available for this version

Comodo Internet Security

- This is version 11. Considering many stability and performance changes have gone into application since release of v10 and product overall test results have improved, we have classified it as v11. While we continue to work on major changes for v12 for 2019 release
- Going forward, you won't see any GeekBuddy alert upon malware detection
- This build is HVCI compliant, this is a feature which is going to be enabled by default in Windows 10 RS5, due in Fall-2018
- When updates to older versions released, updates will be done in two steps, after you have updated, you will see another alert for 2nd update. Any update further on top of this won't require two updates. We have to go through this one time for technical reasons to be ready for next hot-fix release, which will be fully RS5 compliant

- Fixed BSOD as reported here
- Incompatibility with 'Sea of Thieves', 'State of Decay 2', 'Forza Horizon 3' and 'Age of Empires' games
- A public bug 2355 was raised by moderators, where HIPS does not alert for actions when previously trusted rated application is changed to unrecognized
- Firefox issue in Sandbox as reported here
- It has several crash fixes as well, as we found via crash reporting feature
- It has updated Comodo Dragon v66, Comodo Secure Shopping(CSS) v142 and Internet Security Essentials(ISE) v152, both CSS and ISE have update related changes, where during update setup could take high CPU