: Unofficial keys can prevent your antivirus from receiving critical virus definition updates, making it useless against new threats.
This method expired years ago. Avast now uses server-side validation. You cannot fool their license servers with local modifications. avast internet security activation code till 2038 link
The Truth About Avast "2038" Activation Codes: Is It Worth the Risk? avast internet security activation code till 2038 link
If you have purchased or obtained a legitimate activation code, the process is simple: Open the Avast user interface on your PC or Mac. Go to Menu and select Enter Activation Code. Type or paste your code into the text box. Click Enter to synchronize with the Avast servers. Conclusion avast internet security activation code till 2038 link