Una vez que aparezca el mensaje de éxito, escribe slmgr.vbs /ato para intentar la activación inmediata. How To Activate Windows 8.1 Pro. (Build 9600)

embedded in the BIOS/UEFI (common for pre-installed Windows 8.1 systems). The system may activate automatically when connected to the internet.

that can compromise your personal data. Furthermore, these methods are temporary and often get disabled by future security patches. Stick to official methods to keep your data safe.