I am using a Dell laptop with Windows 10. It’s been working great, but occasionally my bluetooth mouse won’t work. Sometimes I need to re-install the driver, sometimes I need to restart the computer. But it does not always resume working.
Below is a method which solved my problem (it’s a youtube video):
In a nutshell, you need to disable “fast boot” in power options, and delete the blooth device in device manager, and then shut down (not restart) your computer, and then start your computer. Hope it works for you.