Typically, Avast offers subscription plans ranging from . A small number of legacy or promotional licenses have covered up to 5 or 6 years, but a key valid until 2038 would represent a 15+ year license —which is highly unusual.
While these keys were widely circulated on forums like Scribd and Facebook , most have been blacklisted by Avast’s servers in recent years. (The most famous "2038" key) C2092321R9946A0912-U52DEWK3 W7414234R9978A0912-1CKJF7CA 3. How Activation Used to Work avast activation key till 2038