/u/Froggy has a good point. Another suggestion is to see if there is a update for your BIOS. If there is, update it. Might be some stupid thing that M$ did with an update and a BIOS update might fix it.

Here is another stupid thing that I have seen work.

1. Reboot into bios. Disable anything and everything you have related to the bluetooth stuff.
2. Boot into MS. Remove all drivers related to the device. (and any installed software if you installed something from the motherboard disk/website).
3. Shutdown entirely. Flip the power switch on your PSU to 0 and hit your power button a few times. (yeah, sounds stupid, sometimes this works).
4. Boot back up into MS, confirm everything else is working. Shutdown entirely again.
5. Boot into the BIOS, Re-enable the stuff you disabled for the Bluetooth. Save/Exit (reboot).
6. Go to the mobo website and download the drivers from there, cancel/ignore if MS tries to install drivers for you.
7. Install the manufacture drivers and reboot.
8. Throw chicken bones or dice, hope it works when it comes back up.

I have had that work with a system before. Only reason I am suggesting it.

Had something like this happen with a wifi card then few months later the computer stopped detecting hard drives. Replaced the psu and everything is working again, worse case scenario guessing.

Also, AND I DOUBT IT, but if you have another pci slot you can try, try to move the device, if software can't be pinpointed.

For shits and giggles, put a linux distro, ANY distro, on a thumbdrive, and see if a liveboot can see and use it.