This morning I turned my computer on and started hearing the noise of a USB device connecting and disconnecting. I checked the device manager to see what was up. I have only have 3 USB devices plugged in but a 4th one keeps popping up. It is labeled Unknown USB Device (Device Descriptor Request Failed). I plugged in other USB devices I have used recently but all of the came up recognized while the other one stayed. If any one can help I would appreciate it.