Hi, Does your Inspiron 1440 have the Dell 365 bluetooth card in it?  I believe that was the bluetooth card that came standard with that model.  Assuming so, you may want to check out this thread regarding Windows 10 drivers for the Dell 365 bluetooth card.  Since the Inspiron 1440 isn't on the list of systems tested to be compatible with Windows 10 that may be the only way to get a compatible driver installed, and allow you to turn bluetooth on and off. Let us know if that helps. Todd
I'm unable to turn on or off Bluetooth option in settings (Inspiron 1440, Win 10-64bit). I have tried windows update for the system. I have tried installing network driver R228532 which produced an Error- "Setup.rul 318 has occurred and Setup cannot continue. 
No Bluetooth in settings