Key para agregar WMC a Windows 8 Pro:

RR3BN-3YY9P-9D7FC-7J4YF-QGJXW

Key for ProWMC:

slmgr.vbs /ipk C7MCR-3R9N7-KX8YH-2X4QC-D668D
slmgr.vbs /ipk GGKFW-TBH8R-H8R6B-NDT88-K2BRQ