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Fix Bluetooth missing in Windows 10 - Unknown USB Device (device descriptor request failed), Intel® Dualband-Wireless-AC 7260
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fixbluetooth.md

Fix Bluetooth missing in Windows 10 - Unknown USB Device (device descriptor request failed), Intel® Dualband-Wireless-AC 7260

I've had this error with an old Intel® Dualband-Wireless-AC 7260 card on a Z97 chipset (specifically on a GIGABYTE GA-Z97N-Gaming 5 (rev. 1.0))

After a Windows 10 Update, Bluetooth went completely missing and instead I've had a "Unknown USB Device (Device Descriptor Request Failed)" error in device manager.

I've stumpled upon this video and it (almost!) did not solve my problem, until I've read the youtube comments and I took a few extra steps.

What finally solved it for me, was using these steps:

  1. Uninstall all Intel Bluetooth drivers.
  2. Install the latest driver version 21.10.1 for Intel Wireless AC 7260 from Softpedia (Intel has discountinued the AC 7260 Series and is not offering driver downloads anymore!)
  3. Go to device manager and delete all USB devices (you might have to try & error in which order, because the "last" one will of course also uninstall your mouse and keyboard, so you cannot click anymore and uninstall devices..). The list needs to be EMPTY! You should NOT have any USB devices left.
  4. Shut down your PC using soft-off power button (for me, pressing the power button shortly just normally shuts down the PC).
  5. Unplug Power Cable (no, really!)
  6. WAIT 3-4 Minutes. If you press the power button again, your PC should NOT have any lights go on.
  7. If you are certain that there is no power in any condensators left, plug in power cable again and boot windows
  8. Windows will now completely go nuts and reinstall all USB devices
  9. Bluetooth should now sho up again in device manager and all USB errors should be gone!

Remarks:

I think what is causing the issue is a specific Windows 10 update, that completely shuts down and deactivates bluetooth, nost likely for "power saving reasons". However, it does it for such an extend, that the bluetooth hardware is basically completely disconnected and we need to force Windows to discover all USB / bluetooth devices again, which it does when we "cold boot" our complete USB device infrastructure.

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