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USB device turns off when Windows boots

Discussion in 'Hardware' started by Computer Guyz, Sep 24, 2008.

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  1. Computer Guyz

    Computer Guyz Thread Starter

    Sep 3, 2008
    Hi all,
    I have a Symbol bar code scanner that plugs in via usb cable. When I push the power button on my pc the scanner turns on, but as soon as windows loads the scanner turns off. If i unplug the scanner and replug it in it works fine. This happens everytime I reboot. Any suggestions????
  2. Specsnow


    Oct 1, 2006
    Hi there,

    On some machines, with certain motherboards, the USB ports are sent power immediately when the computer turns on (which yours does), but then Windows will shut that power off when it boots up so that it can load the drivers for all your devices, and then turn back on again. When Windows cuts power to the USB, your scanner shuts down.

    Unfortunately there is no way to fix this that is documented. I would recommend trying going into the BIOS menu and enabling "Legacy USB Support" and seeing if that works. (That keeps the power alive to the USB all the time, as long as the PC is plugged in.) If that doesn't work, then there is no solution except for what you are already doing.

    Hope this helps.
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