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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  1. Anonymous
    2011-11-23T12:49:19+00:00

    You're welcome.

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  2. Anonymous
    2011-11-25T03:07:25+00:00

    If I remove my printer and install it back correct the problem of Code 43 Unknown device

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  3. Anonymous
    2011-12-01T10:40:28+00:00

    unknown device

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  4. Anonymous
    2011-12-01T12:11:19+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?

    I am facing a similar problem. It's been a couple of days that, everytime I turn on my laptop, a message appears saying that a problem with an unknown USB device has been reported. When I click to see that the problem is, it describes that there is an error 43 on my Port_#0005.Hub_#0004 position. Therefore, everytime this message appears, the webcam (which is of course installed on my laptop) does NOT work. I tried to deactivate and activate again, r to make some downloads but everytime it says that all the drivers are ok and the message keeps appearing.

    what can i do?? Any ideas?

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