I've spent a few hours with this and can only conclude that the Windows 8 driver do not work! Windows 7 driver can be installed, but Dell Mobile Manager can't access the card.
The reason I uninstalled the Windows 7 driver was that it occasionally bluescreened the computer. Thx for that!
So, when do you make a driver that works for windows 8???????????? My users cry for Windows 8 (yes, for real) but I can't roll it out.
/Kristoffer