How to upgrade Windows 8 to 8.1 or 8.1 Update 2 from Store - Actualizar Windows 8 a Windows 8.1 desde la Tienda

Aplicar el parche descrito:

Windows 8 to Windows 8.1 Basic

KB 2871389 Update is available that prepares Windows 8 and Windows RT-based computers for the update to Windows 8.1 and Windows 8.1 RT
https://support.microsoft.com/en-us/kb/2871389