Windows 10: Unknown Device in Device Manager After 1803 Update

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  1.    01 May 2018 #1

    Unknown Device in Device Manager After 1803 Update


    One of my laptops (Dell XPS 13 9350) now has an annoying Unknown Device error in device manager and I've done everything I can think of to find the now missing driver. Issue wasn't present prior to April Update.

    - Unknown device has Hardware ID of BTH\MS_BTHL2CAP. Researching online this is supposedly the Microsoft Bluetooth Protocol Support device.
    - Searching online has been unsuccessful in finding the *.inf with corresponding driver. It is a Microsoft driver that appears to normally come with Windows.
    - My Bluetooth device is an Intel 8260 and I have tried a few Intel drivers to see if it would correct the issue...no luck.
    - I don't use Bluetooth devices with the laptop so I'm not sure if there is an execution problem...more of OCD seeing the yellow exclamation.
    - My other two machines, also updated to 1803, don't show the issue with their Bluetooth adapters, and I don't see the driver inf in their driverstore folders (I was hoping I could cut and paste).
    - SFC/scannow reported 0 integrity violations
    - Windows Bluetooth Troubleshooter reported 0 issues.

    Any recommendations on how I can find the driver and remove the annoyance?
      My ComputerSystem Spec

  2.    01 May 2018 #2

    Try going to Dell’s website, Support, Drivers, then put in your model number. See if you can find the Bluetooth drive there.
      My ComputerSystem Spec


  3. Posts : 86
    Windows 10 Home Single Language
       01 May 2018 #3

    TrustMe said: View Post
    Try going to Dell’s website, Support, Drivers, then put in your model number. See if you can find the Bluetooth drive there.
    I have the same issue as OP and doing that did not fix the problem.
      My ComputerSystem Spec

  4.    02 May 2018 #4

    Yep...I tried the Dell drivers too...they don't affect the unknown device, which appears to require a "Microsoft" driver.
      My ComputerSystem Spec


  5. Posts : 20,990
    windows 10 professional version 1607 build 14393.969 64 bit
       02 May 2018 #5

    Troubleshoot the unknown devices in device manager with the information in this link:
    How to easily find drivers for Unknown Devices in Windows | PCWorld

    Right click a row in device manager > click properties > click details tab > from the property drop-down choose hardware ids > the vendor ID and device ID for that particular device will be listed.
      My ComputerSystem Spec

  6.    02 May 2018 #6

    zbook said: View Post
    Troubleshoot the unknown devices in device manager with the information in this link:
    How to easily find drivers for Unknown Devices in Windows | PCWorld

    Right click a row in device manager > click properties > click details tab > from the property drop-down choose hardware ids > the vendor ID and device ID for that particular device will be listed.
    From my original post, I/we did that and the culprit is BTH\MS_BTHL2CAP. Researching online this is supposedly the Microsoft Bluetooth Protocol Support device. The problem is that searching for it online produces no results where I/we can download a driver to make Windows happy. If anyone knows where we can get that driver, then we should be able to get things working. It is a driver that comes directly with Windows...not a 3rd party driver...for some reason when Windows updated that driver appears not to have migrated.
      My ComputerSystem Spec

  7.    02 May 2018 #7

    Start Device Manager, right-click the unknown device, select "Update driver", "Browse my computer for driver software", then "Let me pick from a list of available drivers on my computer". If a driver is found, install it. You may have to restart the computer for the change to take effect.

    Ben
      My ComputerSystem Spec

  8.    02 May 2018 #8

    Ben Myers said: View Post
    Start Device Manager, right-click the unknown device, select "Update driver", "Browse my computer for driver software", then "Let me pick from a list of available drivers on my computer". If a driver is found, install it. You may have to restart the computer for the change to take effect.

    Ben
    Unfortunately, I tried that too...the driver isn't listed anymore in Windows driverstore. I noticed it also isn't listed in my other machines that were updated (although they didn't have the same Wifi/BT adapter). It may just be a bug that Microsoft will hopefully repair in an update.

    djdelarosa25...out of curiosity, what machine are you having the problem on...mine is a Dell XPS 13...maybe it is a device-specific bug?
      My ComputerSystem Spec

  9.    02 May 2018 #9

    Post a screen shot of your device manager please.

    With OEM's, sometimes these drivers are bundled together with other drivers and it makes it very difficult to find. So it may be under the guise of another driver.
      My ComputerSystem Spec


  10. Posts : 20,990
    windows 10 professional version 1607 build 14393.969 64 bit
       02 May 2018 #10

    Please post an image of the hardware IDs displayed.
    And please post the hardware ID that you looked up in google.
      My ComputerSystem Spec


 
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