I enclose with Windows 7 Ultimate. Since very freshly an unknown device continues popping up in the device manager each time I initiate Windows. Its reported position is within the front USB root hub but I have not distorted there anything recently. The device position reports "Windows has stopped this device because it has reported troubles Code 43". I can uninstall or immobilize it but it will get picked up once more while next time I reboot. All additional USB devices that is: mouse, keyboard, web camera, APC UPS, external drive, printer and so on, work excellent. How do I get free of this annoyance so that it does not come back?