Windows 8 and 8.1 Forums


Unknown devices in Device Manager

  1. #1


    Stockholm
    Posts : 20
    Windows 8.1 Pro 64 bit

    Unknown devices in Device Manager


    I have Windows 8.1 Pro (64 bit) & Hyper V where Windows 7 (32 bit) is installed as a client.
    There are some strange unknown devices shown in Dev Mgr for Windows 7 (pls check attachment).
    Where do they come from ?
    Attached Thumbnails Attached Thumbnails Screenshot.jpg  

      My System SpecsSystem Spec

  2. #2


    San Jose - California
    Posts : 2,847
    8.1x64PWMC Ubuntu14.04x64 MintMate17x64


    Try:

    1. Install Intel Chipset Drivers
    2. If Unknown still exist. Right click on it->Properties->Details and look for device ID then google for it. If found, install the driver for the device.
    3. If still unable to install the drivers. Download: Download Driver Booster 2 Free, the most Effective Driver Updater, to Update Drivers in ONE Click | IObit and run it.
      NOTE: Make sure you uncheck the additional offer to install other software.
      My System SpecsSystem Spec

  3. #3


    A Finnish ex-pat in Leipzig, Germany
    Posts : 1,452
    Windows 8.1 Pro with Media Center


    Those are one Microsoft ACPI-Compliant System driver and rest of them Virtual Machine Bus drivers, they need no drivers and can (should) remain marked with a question mark or exclamation point in Hyper-V virtual machine's Device Manager.

    Click image for larger version

    The Microsoft ACPI-Compliant System driver (highlighted yellow) is just a virtual device checking the generation of the vm (Windows 7 guest can only be Gen. 1):

    Click image for larger version

    The Virtual Machine Bus drivers are taking care of communications between the guest and host. All these drivers are marked with a question mark or exclamation point because the devices themselves are on host, not in guest and the vm is a bit "confused" about this .

    Those drivers should not be updated, just ignore them.

    Kari
      My System SpecsSystem Spec

  4. #4


    Stockholm
    Posts : 20
    Windows 8.1 Pro 64 bit


    Thank
      My System SpecsSystem Spec

  5. #5


    A Finnish ex-pat in Leipzig, Germany
    Posts : 1,452
    Windows 8.1 Pro with Media Center


    Du är välkommen, det var ju inget .

    (Swedish OP. The above in English: You are welcome, that was nothing.)
      My System SpecsSystem Spec

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