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Avast Customer Care 1-844-340-9251
(Toll Free)

Email –


Customer Support Site –

Avast Forum –

Address – Avast Software, Inc. 255 Shoreline Drive,
Suite 515 Redwood City, CA 94065 USA

Avast Help Centre –

Q Updating Virus definitions and Avast Antivirus application 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 application refers to the user interface and all components in Avast Antivirus. Updates to the application provide bug fixes and general improvements.

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

Q Subscription and registration

You can purchase a subscription for Avast Premium Security (previously Avast Premier) or Avast Omni via the Avast Store. To activate your product:

1. Open your Avast order confirmation email and copy the activation code.
2. Right-click the Avast icon in the system tray and select Subscription information from the context menu.
3. On the My Subscriptions screen, click Enter a valid activation code.
4. Enter your activation code and click Enter

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