Virus definition updates will be discontinued for Avast version 9, 10, and 11 by the end of summer 2023.

Updates for Avast version 9 — which was launched in 2014 — are being discontinued. Since we know that this change will affect the loyal Avast users who are still running version 9, we’ve put together a quick list of questions and answers to help make transitioning to the newest version of Avast as smooth as possible.

How do I update to the latest version of Avast from version 9/10/11?

This blog post walks you through updating your Avast product to the latest version of the program. If the update doesn’t work, you can reinstall the product using the following instructions:

1. Uninstall your Avast product: Please refer to this FAQ for detailed uninstallation steps. 2. Install the latest version of Avast: Here's a detailed page with step-by-step instructions.

For additional details about this topic, please refer to our FAQ.

What happens after the virus definitions for Avast version 9/10/11 have ended?

Avast is no longer providing updates for these versions, but your Avast product will still function. However, please be aware that your protection will be compromised. We strongly recommend updating your version of Avast to benefit from important protection features and up-to-date virus definitions.

Why should I update my program version?

When you have the latest version of Avast, the program and virus definitions are updated automatically. This way, we guarantee that you’ll always have the most powerful, up-to-date version of Avast at any given time. If you choose not to update, you will no longer be protected from new viruses.

In addition to receiving the most advanced protection from the latest version of Avast Antivirus, our online help services and customer care team are best equipped to support recent versions of Avast. Updating to the latest version of Avast allows us to deliver the fastest and highest quality of support to our users.