If the USB device driver is not found by the Windows, then also it could lead to this error.ĥ Ways To Fix Unknown USB Device Descriptor Request Failed Error.Another cause is when the USB device is unable to communicate with the system.If the USB device is infected with a virus or some form of malware, then it may cause this error.The BIOS (basic input/output system) system is not updated.The USB device could be faulty or corrupted.What Causes Unknown USB Device Error (Device Descriptor Request Failed)?Īfter gaining some familiarity with the device descriptor, let us now see what causes the unknown USB device (device descriptor request failed) error. It is a 16-bit field containing the number.
IdProduct – This particular number is assigned by the manufacturer to a specific product for the purpose of identifying it. IdVendor – Every company that produces USB devices is assigned this number which is basically a Vendor ID. So, when a device is connected to the Windows operating system, then it uses these specially designated numbers to understand which device driver has to be loaded. There are specific numbers such as the idVendor and idProduct which are responsible for identifying the connected devices in a system. The USB_DEVICE_DESCRIPTOR forms the main base of the descriptor tree. Method 5: Disable the Fast Startup Option What is a Device Descriptor?
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