Wired Keyboard USB Power problem

Discussion in 'Windows, Linux & Others on the Mac' started by Nirurin, Oct 17, 2013.

  1. Nirurin macrumors member

    Oct 3, 2013
    Hey everyone, new iMac owner here :)

    Have been sorting out my bootcamped windows, and I have come accross an annoyance.

    I have the wired apple keyboard, with the two USB3 ports. In OSX these are powered ports.

    HOwever in windows, for some reason, the apple drivers arent working correctly, and they only show up as unpowered ports. This means they wont even load up a standard USB thumb drive, as theres not enough power to read from it. (It comes up with an "insufficient power" popup).

    I came across this guide to fixing it in windows:

    However, that shows that the apple keyboard should show up in device manager as "Generic Usb Hub" (around 4mins into video).

    My device manager shows it as a USB composite device, and a USB2 Hub (both entries disapear if I unplug the keyboard).

    I still tried the fix, forcing the port power to 500 etc, but it didnt actually work.

    Also, the guide video shows that the Hub properties page should have mutliple tabs, including "Power" and "Advanced". Mine doesnt have these.

    I can only assume the the apple drivers are not installing the keyboard correctly, or that I am missing a necessary USB driver somewhere.

    Anyone know the fix for this? I'm on a brand new 2013 iMac, with the current wired keyboard, and windows 7.


    Attached Files:

  2. andy3020 macrumors newbie

    Feb 28, 2014

    I'm having the exact same issue! Did you find a fix?


  3. goodolmike macrumors newbie

    Aug 22, 2014
    I was having the same issue, and I found a solution.
    The issue for m was the digital signature for my keyboard was not valid, so Windows was chaging the driver to Generic USB whatever.

    One solution is to disable Driver Signature Enforcement

    - restart your PC
    - hold down F8 as it starts up
    - navigate down to the option Disable Driver Signature Enforcement

    PC should start up and the keyboard should work. You may need to unplug it and replug it.

    I have a feeling when I reboot next time this will be an issue again, but hey, it's working for now.

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