How do I get Windows Media Center in Win 8.1 Pro when I upgrade from Win 8 Pro with Windows Media Center ?" I purchased both Windows 8 Pro and Windows Media Center and have the product keys for both. I also have the modified product key for Windows 8 Pro with Windows Media Center. The Windows Media Center product key will not work in the Windows 8.1 Pro "add features" facility. So do I have to re-purchase Windows Media Center to get it to work?