How to activate Avast One apps

These activation instructions are for the new version of Avast One, made available on 16 September 2025. For information about activating the old Avast One, refer to the following article: Installing Avast One ▸ Installing the old version of Avast One.

Avast One is an all-in-one digital guardian that allows you to access and manage multiple Avast applications. It is designed to simplify your experience by consolidating various security, privacy, and performance tools into one customizable platform.

Through Avast One, you can install the following apps:

Avast Antivirus (a free version is included in Avast One by default)
Avast SecureLine VPN
Avast BreachGuard
Avast Cleanup
Avast Driver Updater
Avast AntiTrack
Avast Secure Identity
Avast Secure Browser

After purchasing one of these subscriptions, you need to install Avast One, then activate your app through it. Avast One is currently compatible with Windows Devices and you can install and use your subscriptions on a number of devices specified during the purchase.

Installing Avast One

To install the free version of Avast One, follow the steps below:

Click the button below to download the latest version of Avast One for Windows:
Download Avast One for Windows
Once the download is finished, open the avast_antivirus_online_setup.exe file (by default, downloaded files are saved to your Downloads folder).
Click Install and follow the on-screen instructions to complete the installation process. For detailed instructions visit the following article: Installing Avast One.

Once Avast One installed, you can activate your Avast apps through it by either by signing in to the application with your Avast Account credentials or by entering a valid activation code.

Activate via Avast Account

An Avast Account was created using the email address that you provided during the subscription purchase. To sign into your Avast Account for the first time, refer to the following article: Activating your Avast Account.

Follow the steps below to activate an app in Avast One using an Avast Account. If activation via Avast Account fails, you can activate Avast One using a one-time passcode.

To activate an app in Avast One using an Avast Account:

Open Avast One and click Account in the left panel on the main Avast One screen.
Select Sign in.
Enter the email address associated with your Avast Account, then click Continue.
Enter the password associated with your Avast Account, then click Sign In.
All apps associated with your activation code are installed and activated automatically.

To activate an app in Avast One using a one-time passcode:

Open Avast One and click Account in the left panel on the main Avast One screen.
Select Sign in.
Click Request one-time passcode.
Enter the email address associated with your Avast Account, then click Continue. An email containing a temporary passcode is sent to the email address you provided.
Enter the passcode you received in your email inbox, then click Verify.
All apps associated with your activation code are installed and activated automatically.

Your Avast One apps are now active. If activation is unsuccessful, refer to the Troubleshoot activation issues section below.

To see the auto-renewal date of your subscription (or the expiry date, if auto-renewal is canceled), hover your cursor over the left panel and select Account or go to your Avast Account.

Activate via activation code

Your activation code is most commonly found in the order confirmation email you receive after purchasing an Avast subscription. For detailed instructions on how to locate your activation code, refer to the following article: Locating your Avast activation code.

Locate your activation code. The code is included in your order confirmation email. For detailed instructions, refer to the following article: Locate your Avast activation code.
Open Avast One and click Account in the left panel on the main Avast One screen.
Click Enter activation code.
Type or paste your activation code (including hyphens) into the text box, then click Next twice.
All apps associated with your activation code are installed and activated automatically.

Your Avast One apps are now active. If activation is unsuccessful, refer to the Troubleshoot activation issues section below.

To see the auto-renewal date of your subscription (or the expiry date, if auto-renewal is canceled), hover your cursor over the left panel and select Account or go to your Avast Account.

Troubleshoot activation issues

If you experience activation issues, review the information below, which explains how to resolve some of the most common activation issues.

Try these possible solutions:

Ensure that you are entering the credentials for the Avast Account that is linked to your Avast subscriptions. To verify this, sign in to your Avast Account in your web browser and click Manage subscriptions on the My subscriptions tile tile to see a list of the linked subscriptions.
If your Avast subscriptions are not visible in your Avast Account, refer to the following article to manually link the subscription to your Avast Account.
- Adding a missing subscription to your Avast Account
Try following the instructions to activate using an activation code instead. You can find your activation code in your order confirmation email or in your Avast Account. For detailed instructions on how to find your activation code, refer to the following articles:
- Locating your Avast activation code
- Retrieving an activation code from your Avast Account
Completely uninstall and then reinstall the Avast One. This can resolve issues that are caused by incorrect configuration or corrupted files. We recommend following the exact steps in the articles linked below:
- Avast One: Uninstallation | Installation
After reinstallation, try activating your subscriptions again.

If you are still unable to activate your subscription, you can optionally click the link below to open the Avast Technical Support form. After you submit the request, an Avast Support agent will contact you to help resolve the issue.

Contact Avast Support

Try these possible solutions:

Use your Avast Account to retrieve a copy of your activation code to exclude the possibility that the issue is caused by the activation code. For detailed instructions on how to find an activation code via your Avast Account, refer to the following article:
- Retrieving an activation code from your Avast Account
If you see an error message during activation, refer to the following article for advice:
- Troubleshooting common activation error messages
Try following the instructions to activate using your Avast Account instead. For detailed instructions on how to create an Avast Account, refer to the following article:
- Creating an Avast Account
Completely uninstall and then reinstall Avast One. This can resolve issues that are caused by incorrect configuration or corrupted files. We recommend following the exact steps in the articles linked below:
- Avast One: Uninstallation | Installation
After reinstallation, try activating your subscription again.

Contact Avast Support

Avast One

Windows

Updated on: 15/09/2025

List of available regions

Main regions

Installing and Activating Avast One apps

Installing Avast One

Activate via Avast Account

Activate via activation code

Troubleshoot activation issues

Was this article helpful?

Need additional help?

Device problems?

Our experts are here to help!

Device problems?

Our experts are here to help!