Hola "EFEslp",
Intenta desde Command Prompt:
1 - slmgr -ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
2 - slmgr -ato
3 - Verifica que en Event Viewer\Application se cree el Event ID 12288 con Source: Security-SPP
Podes usar onedrive para postear imagenes o contenido.
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Saludos.
[Ignacio Barrios] MPN-MCT: 2019, MCTS: Windows Server 2008 R2, MCSA-MCSE: Window Server 2012 R2, Server Virtualization with Windows Server Hyper-V System Center, MCSA-MCSE: Windows Server 2016 & Azure Fundamentals