Free


Internet Security Software

Complete protection against viruses and attacks.

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4.9 / 5 of 177 Reviews
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Free Internet Security
True Security Label

True security for online banking and shopping

Secure Shopping lets you shop and bank online with confidence. This breakthrough technology isolates your browser inside a secure container which cannot be hacked, tracked or viewed by malware or internet thieves.

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Emerging Threats Label

Stay ahead of emerging threats

Our sandbox technology automatically locks unknown files in a secure environment while our Valkyrie system tests their behavior in real-time - protecting you against malware that the virus industry hasn't even discovered yet.

LEARN MORE   WATCH VIDEO
Integrated Firewall Label

Integrated Firewall

Control which programs are allowed to access the internet, make your computer invisible to hackers and protect your system against all inbound and outbound attacks.

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The Secrets of Comodo Internet Security

Antivirus

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

Anti-Spyware

Detects spyware threats and destroys each infection.

Anti-Rootkit

Scans, detects & removes rootkits on your computer.

Bot Protection

Prevents malicious software turning your PC into a zombie.

Defense+

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.

Anti-Malware

Kills malicious processes before they can do harm.


Comodo Internet Security
Free
Pro
Complete
Defense + Technology
Auto Sandbox Technology™
Compatibility with Windows 7, 8, 10 Vista & XP
Cloud based Antivirus
Spyware Scanning
Award Winning Firewall
Special Features
Secure Shopping
Unlimited Product Support
Unlimited Live Expert Virus Removal
$500 Virus-Free Guarantee
50GB Online Storage & Backup
10GB TrustConnect WiFi Security




Get Comodo Internet Security
Internet Security Premium
Go Pro. Only $39.99 $27.99
FREE DOWNLOAD UPGRADE   
System Requirements:

Supported OS: XP 32bit, Vista/Win7/Win8/Win8.1/Win10 32 bit & 64 bit / 152 MB RAM / 400 MB space

Why Do I Need Internet Security Suite for my PC?



Comodo Internet Security is the free, multi-layered security application that keeps hackers out and personal information in.

Built from the ground upwards with your security in mind, Internet Security offers 360° protection by combining powerful Antivirus protection, an enterprise class packet filtering firewall, advanced host intrusion prevention and automatic sandboxing of unknown files.

Unlike the stripped down versions of commercial software that other software vendors offer for free, this is the full, completely functional version of the product.

Users can upgrade to Comodo Internet Security Pro 10 for just $27.99 per year and receive unlimited live expert virus removal services and our exclusive Virus Free Guarantee.

Malware Removal The Secrets of Comodo Internet Security

  • Antivirus: Tracks down and destroy any existing malware hiding in a PC.
  • Anti-Spyware: Detects spyware threats and destroys each infection.
  • Anti-Rootkit: Scans, detects & removes rootkits on your computer.
  • Bot Protection: Prevents malicious software turning your PC into a zombie.
  • Defense+: 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.
  • Anti-Malware Kills malicious processes before they can do harm.

Comodo Internet Security offers complete protection

...from viruses, Trojans, worms, buffer overflows, zero-day attacks, spyware and hackers. Comodo Internet Security alerts you whenever potential malware attempts to attack or gain access to your system.

Comodo Internet Security program combines powerful antivirus protection, an enterprise class packet filtering firewall, advanced host intrusion prevention, application control and anti-spyware in one supremely powerful application.

Built from the ground upwards with your security in mind, Free Internet Security offers 360° protection by combining powerful Antivirus protection, an enterprise class packet filtering firewall, advanced host intrusion prevention and automatic sandboxing of unknown files.

Comodo's Internet Security suite differs from traditional antivirus software in that it also includes other layers of protection, including anti-spyware, parental controls, privacy protection and much more. This Free Internet Security suite is a complete package that you can download and install for peace of mind.

Using this free internet security software, you defend your PC from malicious software such as viruses, you prevent your personal information from being stolen and you protect your children from Internet dangers.

User Reviews
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Lauri
06/06/2016
5 Star Rating 5 Star Rating 5 Star Rating 5 Star Rating 5 Star Rating
User of 9 years

I have been using Comodo Free Internet Security for well over 9 years now, if I am not mistaken in my calculations. I do not remember a single major infection since switching to Comodo from Avast, to which I switched to from AVG (which now turns out was a horrible mistake on my part way back when, haha). Favorite UI version of the Free Internet Security was back in 2011 though, when I wrote a Finish user manual for that version as my final work for my school back then. So yes, I warmly recommend the Free Internet Security. And if you have the money to do so, please do consider upgrading to the full version. Comodo and their team truly deserve it.

Lucas Chen
06/01/2016
5 Star Rating 5 Star Rating 5 Star Rating 5 Star Rating 5 Star Rating
Perfect security software

Up to now, I have tried and analyzed various anti-virüs programs including Avira, Kaspersky, Bitdefender and Avast. However, one of the softwares I am satisfied with is Comodo. I have been using Comodo Internet Security both on my laptop and on my desktop computer. I like all the services that Comodo provides. It is unbelievably fast and uses so little source on computer.(less than 20 MB) On the other hand, its protection is 5-stars. It is able to detect the viruses which others couldn't. No need to say about the firewall. Highly recommended ! You won't regret trying it.

Hossein
05/30/2016
5 Star Rating 5 Star Rating 5 Star Rating 5 Star Rating 5 Star Rating
Comodo is very Gooooooooooooood.

I believe that comodo is one of the best internet securities in the word.

Mason
05/27/2016
5 Star Rating 5 Star Rating 5 Star Rating 5 Star Rating 5 Star Rating
Recommend to all

I have been using Comodo Free Internet Security for a couple of months now. It is able to track malware and has warned many times. It has not affected system performance and I am very happy with it. I recommend that you guys try it out.

andrew michael king
05/23/2016
5 Star Rating 5 Star Rating 5 Star Rating 5 Star Rating 5 Star Rating
comodo is the best

Comodo internet security is my only love. i hate when i see in the top 10 bitdefender and other products and my Comodo isn't. i use cis since 2010 and i am very proud to this product. it is very light and he protects me very well. BITDEFENDER IS A BULLSHIT is not light and no configurable. i love you Comodo!

What makes Internet Security different?

Default Deny Protection™ (DDP)

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

Prevention-based protection

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

Auto Sandbox Technology™

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.

Secure Shopping

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

Personalized protection alerts

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

Spyware Scanning

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

Cloud based Antivirus

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

Cloud based Behavior Analysis

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

Cloud based Whitelisting

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

Malicious website filtering

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

Game Mode

Suppresses operations that could interfere with a user's gaming experience such as alerts, virus database updates or scheduled scans.

Application Control

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

One-click virus scanning

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

Uncluttered, user-friendly interface

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

Thorough security "wizards"

Preset security settings for simple point-and-click setup.

Exclusive access to Comodo's "safe-list"

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

Get Comodo Internet Security
Internet Security Premium
Go Pro. Only $39.99 $27.99
FREE DOWNLOAD UPGRADE   
System Requirements:

Supported OS: XP 32bit, Vista/Win7/Win8/Win8.1/Win10 32 bit & 64 bit / 152 MB RAM / 400 MB space

Comodo Secure Shopping

Comodo Secure Shopping provides unbeatable security for online banking and shopping sessions by ensuring you connect to those websites from within a security-hardened browsing environment.

  • Hides sensitive online data from other processes running on your PC
  • Prevents key-loggers 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

Auto-Sandbox Technology

Comodo Internet Security prevents even the very latest malware from infecting your system by isolating unknown and suspicious files inside a security hardened virtual environment. Applications executed inside the sandbox will not affect other processes, programs or data on your real computer. In addition to running suspicious applications inside the sandbox on an ad-hoc basis, you can create a specific list of programs that should always run in the sandbox.

Integrated Firewall

Comodo Internet Security includes the buffer-overflow protection original featured in Comodo Memory Firewall.

  • Block all unauthorized inbound or outbound connection attempts on your computer
  • Allow you to specify exactly which programs are permitted to access the internet
  • Stealth the ports on your computer so hackers cannot locate and attack you
  • Let you specify parental controls to filter out inappropriate websites
  • Maintain detailed activity and connection logs so you can troubleshoot issues
  • Isolate your internet browser in a virtual container so online threats cannot access your private data

FAQ for Comodo Internet Security V10

1. 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.

...read more
4. 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.

...read more
7. Can I install only the Firewall or only the Antivirus?

Yes – you are given the option to install exactly the components you want during setup.

2. 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

5. 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.

...read more
8. What is 'Secure Shopping'?

Comodo Secure Shopping provides unbeatable security for online banking and shopping sessions by running your favorite browser 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 attacked by other processes running on your computer. Secure Shopping also features memory-scraping prevention, remote takeover protection and independent SSL certificate authentication to deliver the next-generation of security for online transactions.

...read more
3. 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.

...read more
6. Is it free for business users too?

Yes. However, enterprises looking to implement Internet Security on large networks of workstations would benefit from the centralized management capabilities of Comodo Advanced Endpoint Security.

9. Why should I upgrade to CIS Pro?
CIS Pro offers the same unbeatable protection as our free version plus the following great features:

GeekBuddy
Instantly chat with a Comodo support engineer at any time of day or night. Apart from getting expert advice on any product questions you may have, you can also ask your GeekBuddy to connect to your PC to run a personalized malware cleaning service on it. Just click the GeekBuddy desktop icon to connect. Each CIS Pro license covers 3 PCs, so you get 24/7 professional help for all your devices.

Virus-Free Guarantee
If your PC becomes infected while CIS Pro is installed and cannot be restored to working condition by our support team, the cost of repair is covered up to $500.
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Get Comodo Internet Security
Internet Security Premium
Go Pro. Only $39.99 $27.99
FREE DOWNLOAD UPGRADE   
System Requirements:

Supported OS: XP 32bit, Vista/Win7/Win8/Win8.1/Win10 32 bit & 64 bit / 152 MB RAM / 400 MB space

Need help with your Comodo products? We're here to help, anytime 24/7
Chat Support

When downloading the software you will also
receive access to a GeekBuddy expert, available
24/7. Click on Chat Now from your Management
Interface or click on the GeekBuddy icon on
your desktop.and vendor.

Chat Now!
Product info & sales:
1-866-272-9804
Technical support:
1-877-712-1309

Make sure to have your order number or subscription information available.

For technical product questions visit our Support Home Page click on the "Submit a Ticket" link and select "Internet Security Support" from the dropdown menu and submit.

Online Help Guide

Check out our Online Help Guide for tips on how to use and configure our products and for detailed technical information.
Go to the Help Guide

Forum & Knowledgebase

Our Forum is populated with fellow Comodo users and developers alike and can quite often be the quickest and friendliest way to find answers to questions that you have.
Read the Forum

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What's new?
Secure Shopping

Comodo Secure Shopping is a major new feature in CIS 10 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 10, 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.

Brand New Interface

Comodo Internet Security 10 features the new 'Lycia' interface which features several design and UX enhancements. The new look allows you to accomplish tasks faster while keeping you better informed than ever before.

Web Installers

We've streamlined our installation processes so users always receive the most up-to-date version even if you download an outdated build.


Unblock Applications

Have you ever tried to run a program only to find your security software is blocking it - then can't figure out what you need to do to get it running? Is it the firewall, the behavior blocker, the sandbox or the antivirus which is stopping it? CIS 10's new unblock applications feature allows you to release applications with a single click from whichever security component has blocked them.