Free Internet Security Software

Complete protection against viruses and attacks
for your computers.

Internet Security
User Rating
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4.9 / 5 of 164 Reviews
Free Internet Security

Own an Internet Security Suite that:

  • Secures all connections when you are online
  • Provides fast cloud-based scanning
  • Prevents all viruses and online threats
  • Upgrade available: additional features and services
  • Improves your PC performance and efficiency
Why Comodo Internet Security?
Internet Security

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 8 for just $39.99 per year and receive unlimited live expert virus removal services and our exclusive Virus Free Guarantee.

Release Details: 

Release Date:  April 6, 2015, Update:  Latest release notes

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.

Award Winning Internet Security Suite:

Software Informer Award Software Informer Editor Award Software Informer User Award

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.

Still not sure about upgrade?
FREE DOWNLOAD
System Requirements:

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

User Reviews
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Kevin
05/04/2016
5 Star Rating 5 Star Rating 5 Star Rating 5 Star Rating 5 Star Rating
Cloud-based deployment

Comodo Internet Security is free with cloud-based scanning service. No need to download the program and let it occupy a chunk of space on the hard disk.

Isaiah
05/03/2016
5 Star Rating 5 Star Rating 5 Star Rating 5 Star Rating 5 Star Rating
PC is running smoothly

My laptop speed has improved after I installed Comodo Internet Security. It has clear all unnecessary temp files and other redundancies out of the window, quiet literally.

Daniel
05/02/2016
5 Star Rating 5 Star Rating 5 Star Rating 5 Star Rating 5 Star Rating
Auto-Sandboxing takes the cake

CIS employs it's signature auto-sandboxing feature by default which prevents any harmful processes from entering in to your computer. Thanks for a great product.

Madison
04/29/2016
5 Star Rating 5 Star Rating 5 Star Rating 5 Star Rating 5 Star Rating
Power-packed benefits

Comodo Internet security is the best for cloud-based scanning and behaviour analysis report. I highly recommend it.

mina
04/25/2016
5 Star Rating 5 Star Rating 5 Star Rating 5 Star Rating 5 Star Rating
Excellent

After a day or two of flushing DNS and iconfig, running scans..., someone suggested Comodo. It cleaned my system of all the nastiest and all is well now after the full scan. Impressed and considering buying full version.

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.

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

Our SecureDNS service helps keep you safe online by consulting a real-time blacklist of dangerous websites and warning you if you attempt to connect to one (must be enabled during installation)

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.

Unique "slider" to easily change your current security level

Easily switch between presets to reflect your security preference at any given time.

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.

Still not sure about upgrade?
FREE DOWNLOAD

FAQ for Comodo Internet Security V8

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
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 Endpoint Security Manager (CESM).

Still not sure about upgrade?
FREE DOWNLOAD
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

What's new?
Viruscope

Viruscope monitors the activities of processes running on your computer and alerts you if they attempt to take suspicious actions. Apart from forming yet another layer of malware detection and prevention, the sub-system represents a valuable addition to the core process-monitoring functionality of the Behavior Blocker by introducing the ability to reverse potentially undesirable actions of software without necessarily blocking the software entirely. This provides more granular control over otherwise legitimate software which requires certain actions to be taken in order to run correctly. Viruscope works using a constantly expanded list of activity 'recognizers', which allow the software to detect, block and undo many potentially unwanted actions.

Website Filtering

The new website filtering section gives Comodo Internet Security (CIS Version 8) users a powerful and easy way to allow or block access to specific websites. Website access rules can be created for particular users of your computer, which makes this feature very useful for both home and work environments. For example, parents can block juvenile users from visiting inappropriate websites while companies can prevent employees from visiting leisure sites during working hours. You also have the option to create a log event whenever a user tries to visit a website which is in conflict with a rule. Comodo Internet Security (CIS Version 8) ships with several preset lists (or 'categories') of URLs which can be added to rules that you create - including the 'Malicious sites category', the 'Comodo Safe category', the 'Comodo Phishing category' and the 'Comodo Malware category'.

UI Update

The Comodo Internet Security (CIS Version 8) user interface features several design and UX enhancements which allow you to accomplish tasks faster while keeping you better informed than ever before. New themes include the bold new 'Metro' theme.

Process Activity Dialog is added.

Added 'Please call a live expert' balloon message in main GUI when running into 'At Risk' status.

Virtual Kiosk is renamed to Virtual Desktop

Advanced settings window has been redesigned to provide a better layout

Protected Data Folder

New data security feature which makes important files completely invisible to programs running in the sandbox. Files placed inside a ‘Protected Data Folder’ cannot be read, accessed or modified by any sandboxed application.

Improved

~700% Faster Sandbox.

All Comodo Internet Security (CIS Version 8) Advanced Settings components are now accessible via Comodo Internet Security (CIS Version 8) Tray menu.

Windows in 'grid view': Improved file search operation and added 'search completed' notification; added 'Jump to Folder' option; columns now retain their widths as last changed by the user.

AV Scan results and Rating scan results windows can be viewed in full screen mode.

CIS UI tooltips now correspond to Windows style

Viruscope is now enabled by default, monitors more activities and works on sandboxed applications as well as not sandboxed ones

CIS can now send security and configuration events to Windows Event Logs

Policy based automatic- sandboxing