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MS ACPI CONTROLLER --"Unknown Device"

Discussion in 'Hardware' started by kingstonnard, Jan 29, 2013.

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  1. kingstonnard

    kingstonnard Thread Starter

    Feb 15, 2011
    My Toshiba Satellite M70 laptop shows the following in the Device Manager (Connection View)

    Microsoft ACPI-Compliant Embedded Controller
    ? Unknown device
    ? Unknown device
    ? Unknown device

    At the same time, whenever I plug any USB device into any of the three USB ports the computer freezes and has to be manually rebooted. The Windows Task Manager using CTRL-ALT-DEL can't be accessed.

    The Device Manager says the USB ports are working normally.

    I have updated the drivers but continue to get the same results. The update terminates with a message that a driver can not be found.

    Other than not being able to use the USB ports the machine works fine. Thank goodness for "cloud" backups.

    On line searches have produced no clear solutions. Any help would be appreciated.
  2. Oddba11


    May 12, 2011
    First Name:
    That's a core Windows component. You can try using Windows update or you can possibly just uninstall the device, reboot, and let Windows install the drivers. Aside from that, you will likely need to perform a Repair install (if you have an actual Windows CD) or a Restore.
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