[_nalply]

Never use the word "Cancel" in a warning dialog.

It is easy to get confused. Cancel what? Cancel Bluetooth? Cancel the turning off of Bluetooth?

Better are two buttons like this: [Keep Bluetooth running] [Disable Bluetooth].

Mac OS does this often right. I say this somewhat grudgingly.

[thebruce87m]

You also need a “I don’t know what to do” button. Clicking this will do the most sensible thing which in this case is keeping Bluetooth running. Because my elderly mother is 100% disabling bluetooth under that situation using logic I can’t even comprehend.

[nightowl_games]

Cancel maybe better than that because the confused user doesn't know what the current state of the system is. Cancel means "don't do anything". "Keep" implies the same thing, but I think cancel would confuse less grandparents.