On Windows 10 and I've already paired the Bluetooth headset previously. When I turn it on it connects to the last used device (my iPhone; I manually disconnect).
How do I tell Windows "Please connect to this device you've already paired with?". The current Bluetooth UI doesn't seem to have this very ordinary option.
The laptop is a Macbook Pro, booting to Windows 10 via Bootcamp. Bluetooth otherwise works fine.