To activate Avast Premium Security using a license file (typically ending in .avastlic ), follow the steps below based on official Avast Support procedures.

: Navigate to the folder where you saved the .avastlic file, select it, and click Open .

: On the activation screen, click the link that says Use a license file .

: Be cautious of "license files" from third-party sites like MediaFire or GitHub, as these may contain malware or be blocked by Avast for being illegal.