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: If you previously upgraded from Windows 7 or 8.1 on that hardware, your digital license should automatically reactivate. KMS client activation and product keys - Microsoft Learn

: These (like VK7JG-NPHTM-C97JM-9MPGT-3V66T for Pro) allow you to install a specific edition of Windows 10 but do not activate it for permanent use. Windows-10-Product-Key-2023-Free-Download--Updated-2023-

: Use the Microsoft Media Creation Tool to create installation media for free. : If you previously upgraded from Windows 7 or 8

: Enter a genuine product key during setup or go to Settings > Update & Security > Activation > Change product key . : Enter a genuine product key during setup

Microsoft does provide official free product keys for Windows 10 outside of its original upgrade period. While many sites claim to offer "free updated keys," these are typically generic installation keys or KMS (Key Management Service) client keys. Generic vs. Genuine Keys