USB device descriptor request failed: what is the reason? Why does the handle request fail?

Probably, many users faced the problem when you insert a standard flash drive into the port, and instead of recognizing it the system displays the message "Unknown USB device (device request descriptor failed)". With what this problem is connected and how to solve it, now it will be considered.

USB Device Descriptor Request Failed: Problem

To begin with, the descriptor in the simplest sense is a description of the device and its characteristics, roughly speaking, the data, according to which, with the appropriate driver, the operating system can initialize it.

If, for some reason, a message appears that the device descriptor request failed (error code 43 "Device not recognized"), this only indicates that the system can not obtain the necessary data about the basic rules set for correct operation . At the same time, both software and hardware problems can be a source of failure.

Hardware problems at the physical layer

In the event that the device descriptor crash occurs solely at the physical level, for example, oxidized contacts of a USB flash drive or port, USB inoperable ports, bad or contaminated contacts, etc. may occur. For example, the situation with overestimated power consumption of devices, Connected to the motherboard.

The first thing you need to do is to make the device work - just check the contacts or clean them. Maybe when connecting the same USB flash drive to the USB port, there was a loose connection of the contacts. In any case, it would seem worth paying attention to such seemingly trifling details. In the case of stationary PCs, you can try to open the lid and clean the inside with a vacuum cleaner (there's a lot of dust accumulating there). To clean the ports, you can use a special device USB Port Cleaner.

Analysis of power consumption of peripheral devices and problems of static electricity

One of the reasons that the system displays a message that the USB device descriptor request failed, can be the consumption of electricity, the indicator of which exceeds the nominal value.

To check this information, you first need to go to "Device Manager", which can be called either through the "Control Panel" or by the devmgmt.msc command in the "Run" console (Win + R), and find there the installed USB-controllers, and in Select the item corresponding to the root USB hub.

Next, right-click calls the context menu and selects a property string. On the power tab, make sure that the power consumption does not exceed the available power.

If there is an excess, disconnect all peripheral devices completely with the computer and unplug the cord, then press the power button for a few seconds so that the residual currents on the motherboard disappear. After the operating system is turned on and rebooted, the disconnected devices should be connected in turn to find the source of the failure.

Unknown USB device (Device Descriptor Request failed): Driver Check

If the power consumption is all right, the problem may be with the controller drivers.

You can check their status in the same "Device Manager". If the device is not detected (the descriptor fails), the drivers must be reinstalled. In the list of USB controllers, find all the entries related to the Generic USB Hub, root hubs, and composite devices.

For each of them, you need to perform the driver update operation, called from the right-click menu, and during the installation, either specify a search on the local computer or select a driver from the installed list. As a rule, only one compatible driver will be displayed in the list.

After reinstalling the drivers for all devices, the disappearance of the problem has every chance of success. The problem of compatibility with Windows 10 for USB 3.0 devices is solved not by installing a standard driver from the system's own database, but downloaded from the official website of the computer equipment manufacturer. In particular, this problem concerns most laptops.

How to install, reinstall or update the necessary drivers with third-party programs?

If the above described method did not help, and the system with enviable persistence issues a message that, for example, the request for the BOS USB mouse (the mouse) failed, again and again, you can do otherwise using automated utilities to update the drivers.

One of these is the well-known free program Driver Booster. It allows you to update the drivers of absolutely all components of a computer system or make a selective update, referring directly to the resources of manufacturers of equipment of one type or another.

Problems with chipset drivers

Another reason that the USB device descriptor request fails is that the chipset contains unofficial drivers Intel Chipset Driver, ACPI Driver, Intel Management Engine Interface, etc., which are not recognized by the system. To a greater extent, this applies to Windows 8 and 10 operating systems.

The way out of this situation is obvious: you just need to go to the manufacturer's website and find the appropriate drivers for your hardware and OS version, taking into account the bit depth or, again, use the Driver Booster application.

Troubleshoot problems by setting power save settings

Finally, another situation where the system reports that the USB device descriptor request failed, is that the applicable power saving scheme allows you to disable unused USB ports.

To solve the problem, you must use the same "Device Manager" and, as shown in the driver installation section, enter the properties menu. But only in this case the power management tab is selected. Here you just need to uncheck the permission line to turn off the device in order to save. Again, this procedure is performed for all components, including the Generic USB Hub, root hubs and composite devices. It is very likely that after the changes are saved, the problematic USB device will start functioning normally.

And finally

It remains to add that the search for drivers, even on the site of the equipment manufacturer, is best done not by name, but by two parameters - DEV and VEN. They can be viewed in the device properties window in the "Device Manager" on the information tab, where the hardware ID option is selected in the drop-down list. These two characteristics will help to make an exact search, and not only search for compatible drivers, which after installation may not work correctly.

In some cases, when viewing information and driver files on the corresponding tab, the driver can be rolled back or deleted, after which the system initializes the hardware again, as unknown, and then installs the most suitable driver. But it's better to download it directly. If the downloaded file is in the INF format, you can try right-clicking on the context menu and selecting the installation line. If this option does not work (which is most often the case), when installing or updating the driver using the system, use the installation from the specified location (in the corresponding field, the location of the downloaded file is selected by the Browse button).