Updating Virus definitions and Avast Antivirus Program version

Avast Antivirus uses a database of known virus definitions to identify malware and other threats on your PC, which is why it is important to ensure the Virus Definitions are regularly updated. The Program refers to the user interface and all program components in Avast Antivirus. Updates to the Program provide bug fixes and general improvements.

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

To perform manual updates or configure update settings, refer to the following sections:

Manually update Virus Definitions (VPS)

To manually update Virus Definitions, follow these steps:

  1. Right-click the Avast icon in your system tray.
  2. Hover your cursor over Update and select Engine and virus definitions from the context menu. The Update screen displays the progress of the VPS update.
  3. When the update is complete, click OK.

Manually update the Program

To manually update the Program, follow these steps:

The Program update also includes an update of Engine and Virus Definitions (VPS).
  1. Right-click the Avast icon in your system tray.
  2. Hover your cursor over Update and select Program from the context menu. The Update screen displays the progress of the Program update.
  3. When the update is complete, click OK. If asked to restart your PC, click Restart Now to reboot immediately.

Manage automatic Virus Definition updates

To access Virus Definition update settings, follow these steps:

  1. Open the Avast user interface and click Settings.
  2. Select Update from the left panel.
  3. In the Virus Definitions section, click the downward facing arrow next to Settings to expand the panel, then 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 streaming updates (enabled by default): downloads micro-updates continuously as new malware is discovered.
  4. Click OK to confirm your changes.

Manage automatic Program updates

To access Program update settings, follow these steps:

  1. Open the Avast user interface and click Settings.
  2. Select Update from the left panel.
  3. In the Program section, click the downward facing arrow next to Settings to expand the panel, then tick your preferred option:
    • Automatic update (enabled by default): updates are regularly downloaded and installed. 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 the Program manually, you need to click Update.
  4. Click OK to confirm your changes.

Configure other update settings

Details

The Details section allows you to adjust automatic updates for your internet connection type and set how frequently Avast checks for updates. Click the downward facing 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.

After making any changes, click OK.

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).

After making any changes, click OK.

  • Avast Ultimate 17.x
  • 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 - 32 / 64-bit
  • Microsoft Windows 8.1 / Pro / Enterprise - 32 / 64-bit
  • Microsoft Windows 8 / Pro / Enterprise - 32 / 64-bit
  • Microsoft Windows 7 Home Basic / Home Premium / Professional / Enterprise / Ultimate - Service Pack 1, 32 / 64-bit
  • Microsoft Windows Vista Home Basic / Home Premium / Business / Enterprise / Ultimate - Service Pack 2, 32 / 64-bit
  • Microsoft Windows XP Home / Professional / Media Center Edition - Service Pack 3, 32-bit

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