Yup, it's working just fine on the OSX side. Have tried several of the recommended solutions, including "repairing" boot camp drivers without success (three times, in spite of the thing about doing the same thing over and over expecting a different result).
The closest I've ever gotten is the Bluetooth Setup in Windows recognizing the keyboard, but returning a "Driver Error" after attempting pairing. This has happened twice. I've been able to get to this point by first, getting the Bluetooth setup looking for devices, pulling the batteries out of the keyboard for about 30 seconds, re-installing them, then turning on the keyboard. Only then will the keyboard even be seen despite the advice that the keyboard must be paired with OSX before rebooting to Windows. After the "driver error" message associated with the keyboard, the only option/button contains the caption "remove device".
Additional details that might be relevant(?).
- am using an Apple Wireless Keyboard (Aluminum) model A1255 that's never been a problem with my macMini (6,2).
- this is the first use of Boot Camp for me, and have installed Win10 so don't know if there was a problem with previous Windows versions.
Other suggestions welcome...