Bluetooth totally gone in windows 10

Are there any entries in hidden devices? Also, does msinfo32 show any BT entries?

I have exactly the same problem, with the same symptoms, as the original poster. I'm on a 2016 12" MacBook, and Boot Camp has the latest Windows 10. msinfo32 lists a "Problem Device" of Broadcom Serial Bus Driver over UART Bus Enumerator, with the Error Code "This device cannot start." Checking "System Devices" in Device Manager shows a "Broadcom Serial Bus Driver over UART Bus Enumerator" with a yellow warning triangle. The driver is up to date, but the item shows a status of

"This device cannot start. (Code 10)

{Drive Not Ready}

The drive is not ready for use; its door may be open. Please check drive %hs and make sure that a disk is inserted and that the drive door is closed."

This all happened after the latest Windows update on a very new Boot Camp install (less than a week old). Bluetooth worked before that update. Any thoughts on workarounds (other than those already mentioned in this thread) would be appreciated.

Please see the last part of Re: BootCamp fails to start after upgrade to MacOS Sierra 10.12.1 .

Here's an update: I fixed the problem with the following steps:

1) Search "troubleshooting" in Cortana's search field

2) In the Troubleshooting window, click "View All"

3) Click on "Hardware and Devices" and click "Next" to run the troubleshooter

In my case, it found the problematic driver "Broadcom Serial Bus Driver over UART Bus Enumerator" that I mentioned in my original post and fixed it. After that I restarted and Bluetooth worked again. I don't know why manually re-installing the driver didn't work, but running the troubleshooter did, but I won't look a gift horse in the mouth!

John Willoughby wrote:

I don't know why manually re-installing the driver didn't work, but running the troubleshooter did, but I won't look a gift horse in the mouth!

The driver should be installed using Administrative rights. The manual installation was without privileges.

I am on the same hardware (mid-2016 12" MacBook) and have the same issue. I hope that Apple will resolve this soon.

I recently had this problem on a MacBook Pro 2016. I had previously gotten a Bluetooth mouse working under MacOS and Windows 10. A couple days ago that mouse stopped working on windows but did still work on MacOS. Running Windows 10 I noticed in their Device Manager under System devices the "Broadcom Serial Bus Driver over UART Bus Enumerator" device had a yellow triangle and was getting a "Code 10" error. I right clicked on that device and selected "Uninstall". I then went to the menu, selected "Action/Scan for hardware changes". The device driver installed without an error and the Bluetooth mouse started working again!