How to enable bluetooth in Lenovo ThinkPad L410 (0616-A52)

Bluetooth is a premium addon and not all laptops come with it (even if it has a bluetooth light on it).

As far as how to turn it on if you have it, download the laptops manual if you dont have it and look there.
 
If your laptop has a Bluetooth module, then you need the driver from Lenovo's site and to enable it after you install the driver. It's usually enabled via hotkeys on the keyboard or by a switch on the system.