Unknown device: Windows has stopped this device because it has reported problems (Code 43).

Anonymous
2009-12-09T22:20:11+00:00

I have Windows 7 Ultimate. Since very recently an unknown device keeps popping up in the device manager every time I start Win. It's reported location is within the front USB root hub but I haven't changed there anything lately. The device status reports "Windows has stopped this device because it has reported problems (Code 43)". I can uninstall/disable it but it will get picked up again the next time I reboot. All other usb devices (mouse, keyboard, web camera, APC UPS, external drive, printer) work fine. How do I get rid of this nuisance so that it doesn't reappear?

Windows for home | Previous Windows versions | Devices and drivers

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Anonymous
2009-12-11T14:02:16+00:00

If the problem coincided with hooking up the APC UPS that may indicate the problem is with the UPS.

Somewhat similar situation discussed in the following link:

http://www.velocityreviews.com/forums/t527369-apc-ups-usb-as-unknown-device.html

Your situations seems similar as from the "System Information" file the "problem device" has an Error Code "This device is working properly" yet remains an "Unknown Device".

I would suggest to detach the APC UPS from the computer and uninstall any related software.

Restart the computer and see if the "Unknown Device" problem resolves.

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  2. Anonymous
    2010-07-01T19:55:21+00:00

    I also have the same problem. Under USB-controllers in Device Manager is an Unknown Device with Error Code 43. I do not have a UPS, but if wonder why someone mentioned this:

    [quote]Also, is there a Kingston Data Traveler flash drive presently connected?[/quote]

    I have installed Windows 7 Ultimate from a Kingston DataTraveler USB-device. Could that be the cause? It's not connected anymore, but it was for the installation + drivers. Any solution? Where did you find that problem?

    Any help would be really appreciated.

    Suffering a similar problem, error 43 reported on Laptop and PC running Windows 7 but the product (Sandisk Cruzer Slice 8GB) works fine on my Vista Laptop.

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  3. Anonymous
    2010-07-01T18:41:49+00:00

    I also have the same problem. Under USB-controllers in Device Manager is an Unknown Device with Error Code 43. I do not have a UPS, but if wonder why someone mentioned this:

    [quote]Also, is there a Kingston Data Traveler flash drive presently connected?[/quote]

    I have installed Windows 7 Ultimate from a Kingston DataTraveler USB-device. Could that be the cause? It's not connected anymore, but it was for the installation + drivers. Any solution? Where did you find that problem?

    Any help would be really appreciated.

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  4. Anonymous
    2010-06-24T01:50:31+00:00

    I have the same problem, but it is fixed if I restart the computer. It affects all of my usb connected components like printer and web cam. I have not been able to find a real solution yet. It is very frustrating!

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