Once the download is finished, open the avast_premium_security_setup_online.exe file (by default, downloaded files are saved to your Downloads folder).
Double-click the Avast Premium Security icon on your desktop to open the application, then go to ☰Menu, select My Subscriptions, and choose Enter activation code.
Double-click the Avast Premium Security icon on your desktop to open the application, then go to ☰Menu and select My Subscriptions.
Click the text box below to copy your activation code, paste it directly into the application by pressing the Ctrl and V keys simultaneously, then click Enter.
See detailed activation instructions
Type the activation code you received with the product into the text box, and click Enter(if asked, enter your name, email, and postal code).
See detailed activation instructions
On the My Subscriptions screen, ensure that all products for the recently activated subscription are listed as Active under Subscriptions on this PC. If any products included in this subscription appear under Other available subscriptions, click Activate & install next to the missing product, and wait until the installation is complete.
That's it! Don't forget about installation on other devices.
In your Applications folder, double-click the Avast Security icon to open the application, then go to ☰Menu and select My subscriptions ▸ Activate paid features.
In your Applications folder, double-click the Avast Security icon to open the application, then go to ☰Menu and select My Subscriptions.
Click the text box below to copy your activation code, paste it directly into the application, then click Activate.
See detailed activation instructions
Type the activation code you received with the product into the text box, and click Activate(if asked, enter your name, email, and postal code).
See detailed activation instructions
When prompted, select See my apps(if you selected Not now, go to ☰Menu and select My Subscriptions).
On the list under Subscriptions on this Mac, click Install next to each product for the recently activated subscription, and wait until the installation is complete (if asked for system permissions, enter your Mac account credentials to continue).
That's it! Don't forget about installation on other devices.
Install Avast Mobile Security Premium
Tap the button below to open the Avast Mobile Security page in Google Play Store.
Go to Google Play Store
On your Home screen, tap the Avast Mobile Security icon to open the app, select Get started, then choose Already purchased?(if you switched to a free version with ads, tap the Account icon in the bottom-right corner of the screen, then tap Upgrade Options ▸ ⋮More options (three dots) ▸ Already purchased?).
Type the activation code you received with the product into the text box, and tap Continue(if asked, enter your name, email, and postal code).
See detailed activation instructions
To open the app, tap the Avast Mobile Security icon on your Home screen.
Install Avast Cleanup Premium
Tap the button below to open the Avast Cleanup page in Google Play Store.
Go to Google Play Store
On your Home screen, tap the Avast Cleanup icon to open the app, tap Get started ▸ Next, then select ⋮More options (three dots) ▸ Already purchased?.
Select Use an activation code.
Tap the text box below to copy your activation code, paste it directly into the app, then tap Use this code.
See detailed activation instructions
Type the activation code you received with the product into the text box, and tap Use this code(if asked, enter your name, email, and postal code).
See detailed activation instructions
To open the app, tap the Avast Cleanup icon on your Home screen.
Install Avast SecureLine VPN
Tap the button below to open the Avast SecureLine VPN page in Google Play Store.
Go to Google Play Store
On your Home screen, tap the Avast SecureLine icon to open the app, tap Get started ▸ Next, then select ⋮More options (three dots) ▸ Already purchased?.
Type the activation code you received with the product into the text box, and tap Activate(if asked, enter your name, email, and postal code).
See detailed activation instructions
To open the app, tap the Avast SecureLine icon on your Home screen.
That's it! Don't forget about installation on other devices.
Install Avast Mobile Security Premium
Tap the button below to open the Avast Mobile Security page in App Store.
Go to App Store
Type the activation code you received with the product into the text box, and tap OK(if asked, enter your name, email, and postal code).
See detailed activation instructions
To open the app, tap the Avast Security icon on your Home screen.
Install Avast SecureLine VPN
Tap the button below to open the Avast SecureLine VPN page in App Store.
Go to App Store
Type the activation code you received with the product into the text box, and tap Continue(if asked, enter your name, email, and postal code).
See detailed activation instructions
To open the app, tap the SecureLine icon on your Home screen.
That's it! Don't forget about installation on other devices.
avast_premium_security_setup_online.exe file (by default, downloaded files are saved to your Downloads folder).
avast_security_online.dmg file (by default, downloaded files are saved to your Downloads folder).
Note: If prompted, click Open to allow required permissions in System Preferences.
Avast Mobile Security icon to open the app, select Get started, then choose Already purchased? (if you switched to a free version with ads, tap the 
Account icon in the bottom-right corner of the screen, then tap Upgrade Options ▸ 
Avast Cleanup icon to open the app, tap Get started ▸ Next, then select 
Avast SecureLine icon to open the app, tap Get started ▸ Next, then select 
cloud icon) to download and install the app.
Avast Security icon to open the app, tap Get started ▸ Already purchased?.
SecureLine icon to open the app, tap Get started ▸ Next, then select Already purchased?.
