I am trying to connect bluetooth headphones to my Dell Precision M4800. Using the service tag, it says I have:

555-BBHI : Intel Dual Band Wireless-AC 72 60 802.11ac/a/b/g/n 2x2 + Bluetooth 4.0 LE Half Mini Card

Part number 8TF1D which google says the above description of Bluetooth 4.0 LE Half Mini Card is accurate.

However, I cannot get bluetooth to turn on in Windows 10. I've download the latest Intel bluetooth drive and still nothing.

When I run the bluetooth troubleshooter in Windows, it says Bluetooth is not available on this device. Please try using an external adapter to add Bluetooth capability to this computer.