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Comodo Internet Security

Comodo Internet Security

Version 6.3

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Advanced Settings > Security Settings > Antivirus Settings > Real-time Scanner Settings
  • Introduction To Comodo Internet Security
    • Special Features
    • System Requirements
    • Installation
      • CIS Premium – Installation
      • CIS Pro - Installation And Activation
      • CIS Complete - Installation And Activation
      • Activating CIS Pro/Complete Services After Installation
        • Activating Your License
        • Activating Your Guarantee Coverage
        • Renewal Or Upgrading Your License
    • Starting Comodo Internet Security
    • The Main Interface
      • The Home Screen
      • The Tasks Interface
      • The Widget
      • The System Tray Icon
    • Understanding Security Alerts
  • General Tasks – Introduction
    • Scan And Clean Your Computer
      • Run A Quick Scan
      • Run A Full Computer Scan
      • Run A Rating Scan
      • Run A Custom Scan
        • Scan A Folder
        • Scan A File
        • Create, Schedule And Run A Custom Scan
    • Instantly Scan Files And Folders
    • Processing Infected Files
    • Manage Virus Database And Program Updates
    • Manage Quarantined Items
    • View CIS Logs
      • Antivirus Logs
        • Filtering Antivirus Logs
      • Firewall Logs
        • Filtering Firewall Logs
      • Defense+ Logs
        • Filtering Defense+ Logs
      • Alerts Logs
        • Filtering Alerts Displayed Logs
      • Tasks
        • Filtering Tasks Launched Logs
      • Configuration Changes
        • Filtering Configuration Changes Logs
    • Manage CIS Tasks
    • View Active Internet Connections
    • View Active Process List
  • Firewall Tasks – Introduction
    • Allow Or Block Internet Access To Applications Selectively
    • Stealth Your Computer Ports
    • Manage Network Connections
    • Stop All Network Activities
    • Advanced Firewall Settings
  • Sandbox Tasks – Introduction
    • The Virtual Kiosk
      • Starting The Virtual Kiosk
      • The Main Interface
      • Running Browsers Inside The Virtual Kiosk
      • Opening Files And Running Applications Inside The Virtual Kiosk
      • Configuring The Virtual Kiosk
      • Closing The Virtual Kiosk
    • Run An Application In The Sandbox
    • Reset The Sandbox
  • Advanced Tasks – Introduction
    • Create A Rescue Disk
      • Downloading And Burning Comodo Rescue Disk
    • Remove Deeply Hidden Malware
    • Submit Files
    • Identify And Kill Unsafe Running Processes
  • Advanced Settings
    • General Settings
      • Customize User Interface
      • Configure Program And Virus Database Updates
      • Log Settings
      • Manage CIS Configurations
        • Comodo Preset Configurations
        • Importing/Exporting And Managing Personal Configurations
    • Security Settings
      • Antivirus Settings
        • Real-time Scanner Settings
        • Scan Profiles
        • Exclusions
      • Defense+ Settings
        • HIPS Behaviour Settings
        • Active HIPS Rules
        • HIPS Rule Sets
        • Protected Objects
          • Protected Files
          • Blocked Files
          • Protected Registry Keys
          • Protected COM Interfaces
        • Behavior Blocker
          • The Sandbox - An Overview
            • Unknown Files - The Auto - Sandboxing And Scanning Processes
        • Configure The Sandbox
      • Firewall Settings
        • Firewall Behavior Settings
        • Application Rules
        • Global Rules
        • Firewall Rule Sets
        • Network Zones
          • Network Zones
          • Blocked Zones
        • Port Sets
      • Manage File Rating
        • File Rating Settings
        • Trusted Files
        • Unrecognized Files
        • Submitted Files
        • Trusted Vendors List
  • Comodo GeekBuddy
    • Overview Of Services
    • Activation Of Service
    • Launching The Client And Using The Service
    • Accepting Remote Desktop Requests
    • Chat History
    • Using Issue Tracker
    • Uninstalling Comodo GeekBuddy
  • TrustConnect Overview
  • Comodo Dragon
  • Comodo BackUp
  • Appendix 1 CIS How To... Tutorials
    • Enabling / Disabling Security Components Easily
    • Setting Up The Firewall For Maximum Security And Usability
    • Blocking Internet Access While Allowing Local Area Network (LAN) Access
    • Setting Up The HIPS For Maximum Security And Usability
    • Setting Up The Behavior Blocker For Maximum Security And Usability
    • Password Protect Your CIS Settings
    • Reset Forgotten Password (Advanced)
    • Running An Instant Antivirus Scan On Selected Items
    • Creating An Antivirus Scanning Schedule
    • Running Untrusted Programs Inside Sandbox
    • Running Browsers Inside Sandbox
    • Running Untrusted Programs Inside Virtual Kiosk
    • Running Browsers Inside The Virtual Kiosk
    • Restoring Incorrectly Quarantined Item(s)
    • Submitting Quarantined Items To Comodo For Analysis
    • Enabling File Sharing Applications Like BitTorrent And Emule
    • Blocking Any Downloads Of A Specific File Type
    • Disabling Behavior Blocker And Auto-Sandboxing On A Per-application Basis
    • Switching Between Complete CIS Suite And Individual Components (just AV Or FW)
    • Switch Off Automatic Antivirus And Software Updates
    • Suppressing CIS Alerts Temporarily While Playing Games
    • Renewing Your License
  • Appendix 2 - Comodo Secure DNS Service
    • Router - Manually Enabling Or Disabling Comodo Secure DNS Service
    • Windows XP - Manually Enabling Or Disabling Comodo Secure DNS Service
    • Windows 7 / Vista - Manually Enabling Or Disabling Comodo Secure DNS Service
  • Appendix 3 - Glossary Of Terms
  • About Comodo Security Solutions

Real-time Scanner Settings

 

The real-time scanner (aka 'On-Access Scan') is always ON and checks files in real time when they are created, opened or copied (as soon as you interact with a file, Comodo Antivirus checks it). This instant detection of viruses assures you, the user, that your system is perpetually monitored for malware and enjoys the highest level of protection.


The real-time Scanner also scans system memory on start. If you launch a program or file which creates destructive anomalies, then the scanner blocks it and alerts you immediately. Should you wish, however, you can specify that CIS does not show you alerts if viruses are found but automatically deals with them (choice of auto-quarantine or auto-block/delete).It is highly recommended that leave the Real Time Scanner enabled to ensure your system remains continually free of infection.

  • Enable Realtime Scan
  • Enable scanning optimizations
  • Run cache builder when computer is idle
  • Scan computer memory after the computer starts
  • Do not show antivirus alerts
  • Decompress and scan archive files of extension(s)
  • Set new on-screen alert timeout
  • Set new maximum file size limit
  • Set new maximum script size
  • Use heuristics scanning

To open the Real Time Scan settings panel
  • Click 'Tasks > Advanced Tasks > Open Advanced Settings > Security Settings > Antivirus > 'Realtime Scan'

  • Enable Realtime Scan – Allows you to enable or disable real-time scanning. Comodo recommends to leave this option selected. (Default=Enabled)
  • Enable scanning optimizations – On selecting this option, the antivirus will employ various optimization techniques like running the scan in the background in order to reduce consumption of system resources and speed-up the scanning process (Default = Enabled)

Note: The above two settings can be modified from the 'Advanced View' of the Home screen by clicking the status link beside Antivirus. If you choose Disabled option, both 'Enable Realtime Scan' and 'Enable scanning optimizations' will be disabled. If you choose 'Stateful', both the settings will be enabled and on choosing 'On Access', only 'Enable Realtime Scan' will be enabled. 

 

Detection Settings

  • Run cache builder when computer is idle - CIS runs the Antivirus Cache Builder when the computer is idle, to boost the real-time scanning. If you do not want the Cache Builder to run, deselect this option (Default = Enabled).

  • Scan computer memory after the computer starts - When this check box is selected, the Antivirus scans the system memory during system start-up (Default = Disabled)

  • Do not show antivirus alerts - Allows you to configure whether or not to show antivirus alerts when malware is encountered. Choosing 'Do not show antivirus alerts' will minimize disturbances but at some loss of user awareness. If you choose not to show alerts then you have a choice of default responses that CIS should automatically take – either 'Block Threats' or 'Quarantine Threats'. (Default = Enabled )

  • Quarantine Threats – Moves the detected threat(s) to quarantine for your later assessment and action. (Default)
  • Block Threats – Stops the application or file from execution, if a threat is detected in it.

Note: If you deselect this option and thus enable alerts then your choice of quarantine/block is presented within the alert itself.

  • Decompress and scan archive files of extension(s) - Comodo Antivirus can scan all types of archive files such as .jar, RAR, WinRAR, ZIP, WinZIP ARJ, WinARJ and CAB if this option is left selected. You will be alerted to the presence of viruses in compressed files before you even open them. (Default = Enabled)

You can add the archive file types that should be decompressed and scanned by Comodo Antivirus.

  • Click link on the file type displayed at the right end. The 'Manage Extensions' dialog will open.


  • To add a file type, click the up arrow at the bottom center and click 'Add'.



  • Enter the extension (e.x.: rar, msi, zip, 7z, cab and so on) to be included in the Edit property dialog and click OK
  • Repeat the process to add more extensions
  • Click OK in the 'Manage Extensions' dialog
  • Set new on-screen alert timeout to - This box allows you to set the time period (in seconds) for which the alert message should stay on the screen. (Default = 120 seconds)

  • Set new maximum file size limit to - This box allows you to set a maximum size (in MB) for the individual files to be scanned during on-access scanning. Files larger than the size specified here, will not be not scanned. (Default = 40 MB)

  • Set new maximum script size limit to - This box allows you to set a maximum size (in MB) for the script files to be scanned during on-access scanning. Files larger than the size specified here, are not scanned. (Default = 4 MB)

  • Use heuristics scanning - Allows you to enable or disable Heuristics scanning and define scanning level. (Default = Enabled)

Heuristic techniques identify previously unknown viruses and Trojans. 'Heuristics' describes the method of analyzing the code of a file to ascertain whether it contains code typical of a virus. If it is found to do so then the application deletes the file or recommends it for quarantine. Heuristics is about detecting virus-like behavior or attributes rather than looking for a precise virus signature that matches a signature on the virus blacklist.

This is a quantum leap in the battle against malicious scripts and programs as it allows the engine to 'predict' the existence of new viruses - even if it is not contained in the current virus database.

Leave this option selected to keep Heuristics scanning enabled. Else, deselect this checkbox. If enabled, you can select the level of Heuristic scanning from the drop-down:

  • Low - 'Lowest' sensitivity to detecting unknown threats but will also generate the fewest false positives. This setting combines an extremely high level of security and protection with a low rate of false positives. Comodo recommends this setting for most users. (Default)
  • Medium - Detects unknown threats with greater sensitivity than the 'Low' setting but with a corresponding rise in the possibility of false positives.
  • High- Highest sensitivity to detecting unknown threats but this also raises the possibility of more false positives too.
  • Detect potentially unwanted applications - When this check box is selected, Antivirus scans also scans for applications that (i) a user may or may not be aware is installed on their computer and (ii) may functionality and objectives that are not clear to the user. Example PUA's include adware and browser toolbars. PUA's are often installed as an additional extra when the user is installing an unrelated piece of software. Unlike malware, many PUA's are 'legitimate' pieces of software with their own EULA agreements. However, the 'true' functionality of the software might not have been made clear to the end-user at the time of installation. For example, a browser toolbar may also contain code that tracks a user's activity on the Internet.

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