Tim, restart everything (M10, keyboard, mouse) and try again. I had the same trouble with the Microsoft Designer Desktop Keyboard and Mouse. Eventually (over days and several attempts) I was able to pair the devices with the above procedure.
Unfortunately, the MS Designer keyboard is unusable as it behaves like it has a stuck key. Also, the MS Designer mouse lags behind the user gestures.
Tim, restart everything (M10, keyboard, mouse) and try again. I had the same trouble with the Microsoft Designer Desktop Keyboard and Mouse. Eventually (over days and several attempts) I was able to pair the devices with the above procedure.
Unfortunately, the MS Designer keyboard is unusable as it behaves like it has a stuck key. Also, the MS Designer mouse lags behind the user gestures.