I have tried this on Windows 8.1 RTM Enterprise x64 for several days and am very satisfied with it. Thank you for the good addition for the Windows 8.1. However, I think I found a small glitch. When I shut down my computer it takes about 1~2 minutes when I click the button on the startmenu. When I do win+x and click shutdown or win+r shutdown -s -t 0, it does shutdown instantly. It shut down after about 1~2 minutes when I click the button on the start menu or menu item on the charm bar. Note my computer is uefi booting if that matters.