It was something to be expected, and that is when Apple presented these two novelties, obviously the priority was not exactly that the operation on Windows was 100% perfect from day one, and in fact, it is not.
With the keyboard it is more difficult to understand, since it does not have anything especially new, but with the mouse if it is understood since the Magic Mouse is totally innovative and has features never seen in a mouse in Windows.
We assume that in a short time Apple will supply official drivers for both add-ons and they can be used on Windows, something that can be useful for more than one if you start with Boot Camp.
Source | Appleism