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If you connect something via USB in Windows 10 or Windows 8 (8.1) — flash drives, your phone, tablet, music player or anything else (and sometimes just the USB cable) you see in device Manager an Unknown USB device and the message «the request Failed device descriptor» indicating the error Code 43 (in the properties), in this tutorial I will try to give a working way to fix this error. Another variant of this same error — a failure of the discharge port.
Specification request failed handle of the device or reset the port and the error code 43 saying that not all right with the connection (physical) to the USB device, however in fact, the cause is in this (but if something was done with the ports on the devices or there is a possibility of contamination or oxidation, and check out this factor, and likewise if you connect something via USB hub, try connecting directly to the USB port). More often — it installed the drivers in Windows or not work, but will consider all other options. It may also be useful article:
Update driver software USB Composite device and USB Root hub
If until now, such problems were noticed, and your device began to identify as an «Unknown USB device» for no apparent reason, I recommend to start with this way to solve the problem, as with the simplest and usually the most efficient.
And so for each of these devices. What should happen (if successful): when you upgrade (or rather reinstallation) of one of these drivers for your «Unknown device» will disappear and will appear again, as already identified. Then, with the rest of the drivers to keep it optional.
Optional: if a message stating that the USB device is not recognized you have in Windows 10 and only when connected to USB 3.0 (a typical problem for laptops that have been upgraded to the new OS), it usually helps replacing the standard installed OS driver Extensible host controller Intel USB 3.0 on the driver that is available on the official website of the laptop manufacturer or motherboard. Also for this device in device Manager you can try the method described earlier (update drivers).
The power saving options, USB
If the previous method worked, and after some time your Windows 10 or 8 again began to write about the failure of the device handle and code 43, it could help additional step — disabling the power saving for USB ports.
For this purpose, as in the previous method, go to device Manager and for all device Generic USB Hub USB Root hub and USB Composite device, open via right click «Properties» and then under «power Management» uncheck the option «allow the computer to turn off this device to save power». Apply the new settings.
Incorrect operation of USB devices because of power issues or static electricity
Quite often problems with connected USB devices and malfunction of the device handle can be solved by simply de-energizing of the computer or laptop. How to do for PC:
For laptops which have removable battery all actions will be the same, except that in paragraph 2 is added to «remove the battery from your laptop». This method can help when(at the specified instruction has additional methods to correct it).
The author recommends reading:
- — what to do and why this is happening?
- (for watching videos and games)
The driver on a chipset
Another item which may cause failure of the request descriptor, the USB device fail or the reset port is not installed official driver for the chipset (which should be taken from the official website of the laptop manufacturer for your model or from the manufacturer’s website of your computer’s motherboard). Those that sets itself Windows 10 or 8, and the driver from the driver pack are not always fully operational (although the device Manager you will probably see that all devices are working properly, except for the unidentified USB).
Such drivers may include
- Intel Chipset Driver
- Intel Management Engine Interface
- Various Firmware utilities specific to laptops
- ACPI Driver
- Sometimes, a separate USB driver for third party controllers on the motherboard.
Do not be lazy to go to the manufacturer website support section and check for such drivers. If they are not available for your version of Windows, you can try installing previous versions in compatibility mode (important to match the bitness).
At the moment this is all I can offer. Find your own solution or work something out described? — I will be glad if you share in the comments.