After purchasing Avast Internet Security, you need to activate the product using either a valid activation code (sometimes called a subscription code or voucher code), or via your Avast Account that is registered with the same email address you used to make the purchase.
If you received a license file instead of an activation code, refer to the following article for instructions:
Activate Avast Internet Security
Your activation code can be located in a number of different places depending on the purchase method. For example, in an order confirmation email, on an activation card, or within another Avast product. For instructions on how to locate your activation code, refer to the following article:
To activate Avast Internet Security with an activation code:
- Right-click the
Avast icon in your system tray and select Subscription information. 
- On the My licenses screen, click Enter a valid activation code.
- Type or paste your activation code into the text box and click Enter.
- Check your license details for the entered activation code. If you have an activation code for interchangeable products, you can click on a listed item and select an alternative license from the drop-down menu. Then click Continue to return to the My licenses screen.
All your Avast licenses automatically appear in the Avast Account registered with the same email address you used to make the purchase.
To activate Avast Internet Security via your Avast Account:
- Right-click the Avast icon in your system tray and select Subscription information.
- On the My licenses screen, click Log in to your Avast Account.
- Enter your Avast Account credentials and click Log in. Alternatively, select Log in with Facebook or Log in with Google to log into your Avast Account using your existing Facebook or Google credentials.
- Check your license details for the connected Avast Account. If you have any licenses for interchangeable products, you can click on a listed item and select an alternative license from the drop-down menu. Then click Continue to return to the My licenses screen.
Your Avast Internet Security license is now activated. The expiration date of your license appears under Licenses on this PC.
You can activate your license on the number of PCs you specify when making the purchase.
Further recommendations
- Any unused product licenses are listed under Other available licenses on the My licenses screen. To change your license on the current PC, click Switch to this License next to the listed item, and then click Switch to confirm.
- To transfer your license to a different PC, uninstall Avast Internet Security from your PC before you activate your license on the alternative PC. For instructions, refer to the following article:
Troubleshoot activation issues
To troubleshoot activation issues, reinstall Avast Internet Security on your PC and activate it again. For reinstallation instructions, refer to the following articles:
In some cases, license synchronization may take up to 24 hours after purchase. If your license is still not active after this time, refer to the following article:
- Avast Internet Security 19.x
- Microsoft Windows 10 Home / Pro / Enterprise / Education - 32 / 64-bit
- Microsoft Windows 8.1 / Pro / Enterprise - 32 / 64-bit
- Microsoft Windows 8 / Pro / Enterprise - 32 / 64-bit
- Microsoft Windows 7 Home Basic / Home Premium / Professional / Enterprise / Ultimate - Service Pack 1, 32 / 64-bit