Avast Antivirus: Updating Virus definitions and/or Program version

Updating Virus definitions and/or Program version

Any antivirus program is only as good as its database of known virus definitions. This is what the program uses to identify threats to your computer, which is why it is important to ensure the virus definitions are regularly updated. Updates to the program version provide bug fixes and general program improvements.

By default, Avast Antivirus is set to update the Virus definitions and Program automatically whenever a new version is available. We strongly recommend to keep automatic updates enabled at all times.

Read the instructions below:

How to perform manual Virus Definitions (VPS) update

The Engine is a part of the program that scans your computer for potential threats based on the Virus Definitions. To manually invoke the latest VPS update, please follow these steps:

  1. Right-click the Avast icon in the system tray, select UpdateEngine and virus definitions to launch a virus database update.
  2. The Update screen opens and shows you the overall progress of the VPS update.
  3. After the update finishes, a confirmation message appears. Click OK to close the update results.

How to perform manual Program update

The Program is primarily the user interface which controls what the program does. To manually update the Program, please follow these steps:

The Program update also includes an update of Engine and Virus Definitions (VPS).
  1. Right-click on the Avast icon in the system tray, select UpdateProgram to launch a program update.
  2. The Update screen opens and shows you the overall progress of the Program update.
  3. After the update finishes, a confirmation message appears. Click OK to close the update results. If asked to restart your computer, click Restart Now to reboot immediately.

How to configure automatic updates in Avast Antivirus

To access the Update Settings proceed as follows:

  1. Open the Avast user interface and click Settings.
  2. Click Update in the left panel.
  3. Click the down arrow in the Virus definitions section to expand the Settings panel, and tick your preferred option.
    • Automatic update (enabled by default): updates are downloaded and installed automatically on a regular basis. No actions are required from you.
    • Ask when an update is available: notifies you when an update is available. Your confirmation is required to complete the update.
    • Manual update (not recommended): updates are not automatically installed and you are not notified when a new update is available. To update virus definitions manually, you need to click Update.
    • Enable steaming updates (enabled by default): downloads micro-updates continuously as new malware is discovered.
    Click OK to confirm your changes.
  4. Click the down arrow in the Program section to expand the Settings panel, and tick your preferred option.
    • Automatic update (enabled by default): updates are downloaded and installed automatically on a regular basis. No actions are required from you.
    • Ask when update is downloaded: notifies you when updates are downloaded. Your confirmation is required to complete the update.
    • Ask when an update is available: notifies you when updates are available (before downloading). To receive the update, you need to start the download and installation process manually.
    • Manual update (not recommended): updates are not automatically installed and you are not notified when a new update is available. To update program manually, you need to click Update.
    Click OK to confirm your changes.

Other available settings

Details

The Details section allows you to select your internet connection method and set how frequently Avast checks for updates. Click the down arrow next to Details to expand the panel.

You can adjust the following settings:

  • I only connect to the internet using a dial-up modem: tick this option if you access the internet by dialing a telephone number on a conventional telephone line. This setting prevents auto-dialing for auto-updates. The update will be delayed until the next time you connect to the internet.
  • Auto-update: type a number into the text box to indicate how often (in minutes) you want to receive updates. The default setting is 240 minutes. This setting is for regular virus definitions updates only and does not relate to streaming updates. If the Enable streaming updates option is ticked in the Virus Definitions section, micro-updates are provided continuously.
  • Show notification box if an error occurs (enabled by default): sends you a notification if the update was not successful.

Click OK to confirm your changes.

Proxy Settings

The Proxy Settings section is for users who connect to the internet through a proxy server. This section allows you to adjust your proxy settings to avoid issues with downloading virus definitions and program updates. Click the down arrow next to Proxy Settings to expand the panel.

If you connect directly to the internet, you can ignore this section as the Direct connection (no proxy) option is ticked by default.

To adjust proxy settings, select Specify proxy server and type the proxy details:

  • Type: select HTTP or SOCKS4.
  • Address: type the address of your proxy server.
  • Port: type the port your proxy server uses.
  • Authentication type: if the proxy server requires authentication, specify the type and enter the Username and Password.

If you do not know your proxy details, contact your network administrator or your internet service provider (ISP).

Click OK to confirm your changes.

  • Avast Premier 17.x
  • Avast Internet Security 17.x
  • Avast Pro Antivirus 17.x
  • Avast Free Antivirus 17.x
  • Microsoft Windows 10 Home / Pro / Enterprise / Education
  • Microsoft Windows 8.1 / Pro /Enterprise
  • Microsoft Windows 8 / Pro / Enterprise
  • Microsoft Windows 7 Home Basic / Home Premium / Professional / Enterprise / Ultimate
  • Microsoft Windows Vista Home Basic / Home Premium / Business / Enterprise / Ultimate
  • Microsoft Windows XP Home / Professional / Media Center Edition)

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