The reasons for Windows does not recognize the USB device, may be different (there are really many of them), and therefore there are several solutions to the problem, and some will work for one user, others for another. I will try to miss anything. See also: USB device descriptor query failure (code 43) in Windows 10 and 8
The first steps when the error appears "USB device is not recognized"
First of all, if you have the specified Windows error when you connect a flash drive, mouse and keyboard or something else, I recommend to make sure that everything is not a problem of the USB device itself (this is at least you will save your time).
To do this, just try, if there is such an opportunity, connect this device to another computer or laptop and check if it works there. If not, there is every reason to assume that the reason in the device itself and the ways are probably not suitable. It remains only to check the correct connection (if the wires are used), connect not to the front, and the rear USB port, and if nothing helps it - you need to diagnose the device itself.
The second way to try, especially if earlier the same device worked normally (as well as if the first option cannot be implemented, since there is no second computer):
- Disconnect the USB device that is not recognized and turn off the computer. Pull the plug out of the outlet, then press and hold the power button on the computer for a few seconds - it will remove the balances of charges from the motherboard and components.
- Turn on the computer and connect the problem device again after Windows boot. There is a possibility that it will work.
The third paragraph, which can also help faster than all that will be described below: If a lot of equipment is connected to your computer (especially to the front panel of the PC or via USB), try to disable it that is not needed right now, and the device itself By causing an error, if possible, connect to the rear panel of the computer (if only this is not a laptop). If it worked, it is not necessary to read further.
Optional: If the USB device has an external power source, connect it (or check the connection), and if possible, check if this power supply works.
USB Device Manager and Driver Manager
In this part, we will talk about how to correct the error USB device is not recognized in the Windows 7, 8 or Windows device manager. I note that it is several ways at once and, as I wrote above, they can work, and may not specifically for Your situation.
So, first of all go to the Device Manager. One of the rapid ways to do is to press the Windows keys (with the emblem) + R, enter Devmgmt.msc and press ENTER.
Your unidentified device will most likely be in the following sections of the dispatcher:
- USB controllers
- Other devices (and called "Unknown Device")
If this is an unknown device in other devices, then you can connect to the Internet, click on it right mouse button and select the "Update Drivers" item and, perhaps, the operating system itself will install everything you need. If not, you will help you how to install the driver of an unknown device.
In the case when an unknown USB device with an exclamation mark is displayed in the list "USB Controllers", try the following two things:
- Right-click on the device, select "Properties", then on the Driver tab, click the "Run" button if it is available, and if not, "Delete" to delete the driver. After that, in the Device Manager, click "Action" - "update hardware configuration" and see if your USB has no device to be unidentified.
- Try to go to the properties of all devices with the GENERIC USB HUB names, the root USB hub or USB root controller and on the "Power Management" tab to remove the "Allow shutdown of this device to save power."
Another way, the performance of which was able to see in Windows 8.1 (when the system writes error code 43 In the description of the problem, the USB device is not recognized): For all the devices listed in order, try the following: Right-click - "Update Drivers". Then, search for drivers on this computer - select the driver from the list of already installed drivers. In the list you will see a compatible driver (which is already installed). Select it and click "Next" - after reinstalling the driver for the USB controller to which an unidentified device is connected, it can earn.
USB 3.0 devices (USB flash drive or external hard drive) are not recognized in Windows 8.1
On laptops with the Windows operating system 8.1, the USB error is not recognized quite often for external hard drives and USB 3.0 flash drives.
Solve this problem helps change the parameters of the laptop power circuit. Go to the Windows Control Panel - the power supply, select the used power circuit and click "Change Advanced Power Parameters". Then, in USB parameters, prohibit temporary shutdown of USB ports.
I hope that something from the listed will help you, and you will not see messages that one of the USB devices connected to this computer is incorrect. In my opinion, listed all the ways to correct the error with whom we had to face. Additionally, it can also help the computer does not see the flash drive.