To activate the premium features in Avast One, you need to sign in to the application with an Avast Account that contains a valid Avast subscription. The instructions in this article explain how to sign in to Avast One using an Avast Account or an activation code.
Activate via Avast Account
To activate an app in Avast One using an Avast Account:
- Open Avast One, hover your cursor over the left panel and click Account.
- 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.
Avast One is now active. If you are having issues logging into your Avast Account, follow the steps below to activate Avast One using a one-time passcode.
Activate via one-time passcode
- Open Avast One, hover your cursor over the left panel and click Account.
- 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.
Avast One is now active. If activation is unsuccessful, refer to the Still need help? section below.
Activate the old version of Avast One
To activate the old version of Avast One follow the steps below:
- Open Avast One and click Account in the left panel on the main Avast One screen.
- Select Sign in and follow the on-screen instructions to sign in to your Avast Account.
Account in the left panel on the main Avast One screen.
Activate via activation code
To activate an app in Avast One using an 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, hover your cursor over the left panel and click Account.
- 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.
Avast One is now active. If activation is unsuccessful, refer to the Still need help? section below.
To activate the premium features in Avast One, you need to sign in to the application with an Avast Account that contains a valid Avast One subscription. The instructions in this article explain how to sign in to Avast One with an Avast Account.
Activate via Avast Account
- Open Avast One and click Account in the left panel on the main Avast One screen.
- Select Sign in. Your default web browser opens.
- Follow the relevant step below (option A or option B) in your browser:
- Option A: Check that the listed Avast Account is the one that contains your Avast One subscription, then click Yes, continue. Alternatively, click Sign in as someone else or Login for the first time.
- Option B: Enter the credentials for the Avast Account that contains your Avast One subscription, then click Continue. Alternatively, click Login for the first time.
- Option A: Check that the listed Avast Account is the one that contains your Avast One subscription, then click Yes, continue. Alternatively, click Sign in as someone else or Login for the first time.
- When prompted by your browser, follow the on-screen instructions to re-open Avast One.
Avast One is now active. If activation is unsuccessful, refer to the Still need help? section below.
To see the auto-renewal date of your subscription (or the expiry date, if auto-renewal is canceled), click the 
Account in the left panel or go to your Avast Account. You can activate Avast One on the number of devices you specified when making the purchase.
Activate via sign-in key
If activation via Avast Account fails, you can activate Avast One using the sign-in key from your web browser. To use this alternative activation method, follow the steps below:
- Open Avast One and click Account in the left panel on the main Avast One screen.
- Select Sign in. Your default web browser opens.
- Follow the relevant step below (option A or option B) in your default web browser:
- Option A: Check that the listed Avast Account is the one that contains your Avast One subscription, then click Yes, continue. Alternatively, click Sign in as someone else.
- Option B: Enter the credentials for the Avast Account that contains your Avast One subscription, then click Continue.
- Option A: Check that the listed Avast Account is the one that contains your Avast One subscription, then click Yes, continue. Alternatively, click Sign in as someone else.
- Click Get a sign-in key instead.
- Click Copy to clipboard.
- Go to Avast One, and click enter the sign-in key from your browser.
- Type or paste your sign-in key into the text box, then click Continue.
Avast One is now active. If activation is unsuccessful, refer to the Still need help? section below.
To see the auto-renewal date of your subscription (or the expiry date, if auto-renewal is canceled), click the Account in the left panel or go to your Avast Account. You can activate Avast One on the number of devices you specified when making the purchase.
To activate the premium features in Avast One, refer to the instructions in the relevant section below:
- Activate via Avast Account: Applies if you purchased Avast One from the official Avast website, or via another Avast application on your Windows PC or Mac.
- Restore via Google Play: Applies if you purchased Avast One via Google Play Store.
Activate via Avast Account
- Tap the Avast One icon on your device. The app opens.
- Tap Account, then select Sign in.
- Enter your Avast Account credentials, then tap Continue.
Account, then select Sign in.
Avast One is now active. If activation is unsuccessful, refer to the Still need help? section below.
To see the auto-renewal date of your subscription (or the expiry date, if auto-renewal is canceled), click the 
Account in the bottom panel or go to your Avast Account. You can activate Avast One on the number of devices you specified when making the purchase.
Restore via Google Play
Avast One subscriptions purchased via Google Play Store are activated automatically on the Android device you used to make the purchase. Follow the instructions below if you want to change or reset your device, or if automatic activation via Google Play Store is unsuccessful.
To restore your Avast One subscription via Google Play Store:
- Ensure you are signed in to Google Play Store with the same Google Account that you used to purchase Avast One. For instructions on how to verify this, refer to the following article:
- Tap the Avast One icon on your device. The app opens.
- Tap Account, then tap your subscription.
- Tap Restore from Google Play.
The app automatically retrieves and activates your Avast One subscription from Google Play Store.
If activation is unsuccessful, refer to the following article:
To activate the premium features in Avast One, refer to the instructions in the relevant section below:
- Activate via Avast Account: Applies if you purchased Avast One from the official Avast website, or via another Avast application on your Windows PC or Mac.
- Restore via the App Store: Applies if you purchased Avast One via the App Store.
Activate via Avast Account
- Tap the Avast One icon on your device. The app opens.
- Tap Account, then select Sign in.
- Enter your Avast Account credentials, then tap Confirm.
Avast One is now active. If activation is unsuccessful, refer to the Still need help? section below.
To see the auto-renewal date of your subscription (or the expiry date, if auto-renewal is canceled), click the 
Account in the bottom panel or go to your Avast Account. You can activate Avast One on the number of devices you specified when making the purchase.
Restore via the App Store
Avast One subscriptions purchased via the App Store are activated automatically on the iOS device you used to make the purchase. Follow the instructions below if you want to change or reset your device, or if automatic activation via the App Store is unsuccessful.
To restore your Avast One subscription via the App Store:
- Ensure you are signed in to the App Store with the same Apple ID that you used to purchase Avast One. For instructions on how to verify this, refer to the following article:
- Tap the Avast One icon on your device. The app opens.
- Tap Account, then tap your subscription.
- Select Restore from App Store.
The app automatically retrieves and activates Avast One from the App Store.
If activation is unsuccessful, refer to the following article:
Still need help?
The information below explains how to resolve some of the most common activation issues:
- Ensure that the subscriptions you wish to use through Avast One are available in your Avast Account. To verify this, sign in to your Avast Account in your web browser and click the Subscriptions tile to see a list of the linked subscriptions.
- If a subscription does not appear in your Avast Account, you can add it manually. For instructions, refer to the following article:
- Completely uninstall Avast One from your device, then reinstall it again. This can resolve issues that are caused by incorrect configuration or corrupted files. We recommend following the exact steps in the following articles:
After reinstallation, try activating Avast One again.
If the issue persists, contact Avast Support.
The information below explains how to resolve some of the most common activation issues:
- Ensure that your Avast One subscription appears in your Avast Account. To verify this, sign in to your Avast Account in your web browser and click the Subscriptions tile to see a list of the linked subscriptions.
- If your Avast One subscription does not appear in your Avast Account, you can manually add the subscription. For instructions, refer to the following article:
- Completely uninstall Avast One from your device, then reinstall it again. This can resolve issues that are caused by incorrect configuration or corrupted files. We recommend following the exact steps in the following articles:
After reinstallation, try activating Avast One again.
After reinstallation, try activating Avast One again.
After reinstallation, try activating Avast One again.
If the issue persists, contact Avast Support.
Further recommendations
To learn more about Avast One, refer to the following article:
For instructions on how to use Avast One, refer to the following article:
- Avast One
- Windows, macOS, Android, and iOS
Updated on: 23/09/2025
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