If you see “Invalid license” on a key you bought, contact Avast support immediately — they are responsive for paying customers.
To use Avast Premier, users need to activate the software with a valid license key. A license key is a unique code that unlocks the full features of the software, allowing users to access all the advanced security features. Avast Premier license keys can be purchased from the official Avast website or authorized resellers. If you see “Invalid license” on a key
Licenses valid until 2048 or other distant dates are common in the "warez" or software cracking scene. If you see “Invalid license” on a key