How to Resolve Bluetooth Unknown Device Connection Failed Issues

Your Bluetooth device can’t connect in Windows 10. In Device Manager, you noticed the Bluetooth driver is missing, and an ‘Unknown USB device (Device descriptor request failed)’ is listed under Universal Serial Bus controllers. Don’t worry; you can try the methods below to fix the problem.

Method 1: Uninstall the unknown device
Method 2: Uninstall the USB host controller
Method 3: Update the bluetooth/chipset drivers
Method 4: Disable the USB Selective Suspend Settings

Method 1: Uninstall the unknown device

One of the methods to fix the problem is to uninstall the unknown USB device, then shut down and turn on your computer. To do so:

1) Open Device Manager.

2) In Device Manager, right-click on the unknown USB device and select Uninstall device, then follow the on-screen instructions to uninstall the device.

3) Shut down your computer.

4) Unplug your computer. The steps vary depending on the desktop or laptop you’re using.

For desktop users, refer to these steps:

4a) Unplug the power cord.

4b) Flip the PSU switch from 0-1 to turn it off (the switch is located on the case back).

4c) Press and hold the power button for 30-60 seconds. This is to drain the charge stored in the capacitors.

For laptop users, refer to these steps:

4a) Unplug the charger.

4b) Remove the battery. (If your laptop doesn’t have a removable battery, skip this step).

4c) Press and hold the power button for 30-60 seconds. This is to drain the charge stored in the capacitors.

5) Turn on your computer and see if the bluetooth device is back.

Method 2: Uninstall the USB host controller

To fix bluetooth shown as Unknown USB Device issues, you can try to uninstall the USB host controller device. This method has been reported to work for many Windows 10 users. You can give that a try. To do so:

1) In Device Manager, right-click on Intel USB 3.0/3.1 eXtensible Host Controller and select Uninstall device. Then follow the on-screen instructions to uninstall the device.

2) Restart your computer and check to see if the bluetooth unknown device issue is resolved.

If the problem persists, try the next method.

Method 3: Update the bluetooth/chipset drivers

Faulty or outdated bluetooth/chipset drivers can cause the problem. To fix the problem, you can try to update the bluetooth drivers and chipset drivers.

You can go to the PC manufacturer’s website to download the drivers. Usually, drivers can be downloaded from the Drivers, Support, or Download section.

Alternatively, you can search “PC model + driver” using your preferred search engine, then you can find the driver download page of your PC directly from the search results.

Once updating the drivers, restart your computer and check to see if the bluetooth not working issue is resolved.

Method 4: Disable USB Selective Suspend Settings

To fix the problem, you can try to disable USB selective suspend settings. Here’s how:

1) Press Win+I keys to open Settings.

2) Select System.

3) In the left pane, select Power & sleep. Then in the right pane, click on the Additional power settings link.

4) Click Change plan settings.

5) Click Change advanced power settings.

6) Expand USB Settings -> USB selective suspend setting, and set Setting as Disabled.

7) Click Apply -> OK to save the changes.

8) Restart your computer and check to see if the problem is resolved.

Hopefully you find this article helpful. If you have any questions, feel free to drop a comment below. I’ll get back to you ASAP.