. Avast does not officially offer "lifetime" or 20-year subscriptions; their genuine premium products are typically sold as annual or multi-year plans. The Risks of Using 2038 Activation Codes
It is important to understand that activation codes guaranteeing service until 2038 are generally provided directly by Avast.
Avast uses cloud-based validation. Once a specific code is shared publicly online, Avast blocks it globally.