Activating Avast Pro Antivirus with a license file

If you purchased Avast Pro Antivirus and received an order confirmation email containing a license file, you need to insert the file to Avast Pro Antivirus to activate the product.

Before following the activation steps in this article, ensure the latest version of Avast Pro Antivirus is installed on your PC. For instructions, refer to the following article:

Activate Avast Pro Antivirus

You may have received a license file in an old order confirmation email, or in case you requested a copy of your license.

If you received an activation code instead of a license file, refer to the following article for instructions:

To activate Avast Pro Antivirus with your license file:

  1. Open your order confirmation email.
  2. Right-click the attached License.avastlic file to save it.
  3. Select a familiar location to save the file (for example, your desktop) and click Save.
  4. Right-click the Avast icon in your system tray and select Subscription information.
  5. On the My licenses screen, click Enter a valid activation code.
  6. Click Use a license file.
  7. Locate the previously saved License.avastlic file and click Open.
  8. Check your license details for the inserted file. If you have a license file 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 Pro Antivirus 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. The number of PCs in your license is specified in your order confirmation email.

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 Pro Antivirus from your PC before you activate your license on the alternative PC. For instructions, refer to the following article:
  • To troubleshoot activation issues, reinstall Avast Pro Antivirus on your PC and activate it again. For instructions, refer to the following article:
  • Avast Pro Antivirus 18.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
  • Microsoft Windows Vista Home Basic / Home Premium / Business / Enterprise / Ultimate - Service Pack 2, 32 / 64-bit
  • Microsoft Windows XP Home / Professional / Media Center Edition - Service Pack 3, 32-bit

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