I'm interested in the comment that "other people have gotten the mice to work". Have they really? I spent much of the weekend on the phone with both Dell and Microsoft try to get a Microsoft Bluetooth Mouse to work. I have the Microsoft Bluetooth Keyboard and it works fine. I don't have the Dell internal 300 Bluetooth Card yet because I want to get the mouse working with it's own transmitter first. The mouse worked when I first installed it. But will not work after a shut down and new start up. I can get it to work each time by removing it and going through the discovery process again. But as soon as I shut down and restart it won't work again. It is being found on start up but the drivers don't load. It is only in "Remembered" state, not "Authenticated" like the keyboard. MS is now scratching their heads and have the problem with a research team. Does anyone here have any suggestions? Any help will be greatly appreciated.