So as you can see, it works for some users with the default installation.
And for all the users who do a clean install to get rid off all these tons of preinstalled crap it doesn't.
(By the way (OT): Why has this to be? why can't you deliver your machines with just Windows and drivers installed? This would save your customers a lot of time.)
I even don't understand, why this should be by design, because it can't be so difficult to make the Hotkey-app correctly detecting the bluetooth during installation and make it work in the FN+F5 Menu.