magic mouse windows 10

I've got a MacBook 2015 that is setup with boot camp v6.0.6133 and windows 10, and trackpadmagic drivers installed but the apple mouse and keyboard wont pair.
They show up in the pairing on windows when I first boot, but on clicking to pair, I get an error msg saying cannot pair. Then they wont show up again until I reboot.
They both work fine on the mac side, with El Capitan.

What am I doing wrong? Other people seem to get it working ok.