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Unknown Device Driver Free Download

The Unknown USB device (device descriptor request failed) in Windows Device Manager on HP and Lenovo would stop your USB devices like an Android mobile, flash drive or pen drive from being properly detected for use in Windows 10, 8 or 7, but we finally resolved the USB not recognized problem for you. In case any USB malfunction could endanger data, let EaseUS Data Recovery Wizard recover data from the inaccessible USB drive.

Driver Unknown Device Freeware. Unknown Device Identifier v.5.02. Identify unknown devices with yellow question marks in your system and look for drivers for them. Driver backup is optional. Unknown Devices, free and safe download. Free Download for Windows. A Program That Makes Updating Device Drivers Easy. Alternatives to Unknown Devices. Apr 10, 2020 Right-click to open and see the corresponding Unknown driver (marked with a yellow exclamation) Click on Update Driver Software. Now you will be redirected to the next screen. Click on Search Automatically for Updated Driver Software. Once Device Manager detects any new build for the particular drive, then it will download and install it. To begin to download unknown device drivers: Click Update/Driver update in the menu bar, ' Update Drivers ' window appears. Wait a moment, all available driver updates will show in the list box. Class name of Unknown device driver is ' Unknown ', click it and its driver detail and download link is in the text box. Download Unknown Device Tool - A free, lightweight, portable and simple-to-use software application that identifies devices unknown by Windows, and shows them in a tree view.

Unknown USB Device (Device Descriptor Request Failed) is a Windows Device Manager error under the 'Universal Serial Bus controllers' section. The current device status is demonstrated as 'Windows has stopped this device because it has reported problems. (Code 43). A request for the USB device descriptor failed.'

Method 2: I suggest you to update USB drivers in the Device Manager and check if it helps. Press Windows Key + R Key. Then type “devmgmt.msc” without the quotes and hit on Enter Key. Expand Universal Serial Bus Controllers and try to update all the drivers in the list. Right click on the drivers and click on Update Diver Software. In Internet Explorer, click Tools, and then click Internet Options. On the Security tab, click the Trusted Sites icon. Click Sites and then add these website addresses one at a time to the list: You can only add one address at a time and you must click Add after each one.

What Is a Device Descriptor?

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The device descriptor (USB_DEVICE_DESCRIPTOR) is the root of the descriptor tree and contains basic device information. idVendor and idProduct of which are the unique members for the Windows operating system to identify the connected device and determine which device driver must be loaded.

Anyway, we don't care about the tech-savvy's jargon, but only get to know - how do I fix the device descriptor when the request failed?

How Do I Fix Device Descriptor Request Failed?

Driver issues take the most responsibility for an unknown USB device on HP, Lenovo, Dell, and many computers. As you've concerned, the device descriptor request failed error is a generic unknown USB problem, so it's reasonable to suspect a driver issue at present. The USB device here mentioned can be a flash drive, pen drive, Android, digital camera, and any digital gadget that is supposed to use on a Windows machine.

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In the next part, we mainly show you the common troubleshooting methods for the device descriptor request failed error in Windows 10. As a matter of fact, Windows 7 and Windows XP users are also having the same problem. Never mind applying the solutions to your own Windows operating system. They're all-OS-versions compatible.

3 Quick Fixes to Unknown USB Device (Device Descriptor Request Failed) in Windows 10

In case that unknown USB device (device descriptor request failed) error happens because the USB port is not working or USB device is damaged, the following three fixes are significant to try before going to further troubleshooting.

  1. 1. Try plugging in a working USB drive to check whether the USB port is working or damaged.
  2. 2. Plug your USB into a different PC to check whether the USB drive is working or damaged.
  3. 3. Check if the USB device shows up in Disk Management. As long as the data matters, download EaseUS free data recovery software to recover data from the inaccessible USB device in advance.

Step 1. Run USB data recovery software.

Connect the USB flash drive to your computer and launch EaseUS USB data recovery software on your PC. Select your USB drive which marks as a removable disk, and click 'Scan' to start finding your lost files.

Step 2. Scan all lost files from USB.

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EaseUS Data Recovery Wizard will thoroughly scan your USB flash drive and find all your lost data on it. After the scanning process, use the Filter feature to filter a specific file type. You can check and preview found USB files in this program.

Step 3. Restore all lost files from USB.

A double-click will allow you to preview the file results. Choose the target files and click 'Recover' to save them to a secure location on your PC or other external storage devices.

5 Advanced Fixes to Unknown USB Device (Device Descriptor Request Failed) in Windows 10

Due to the uncertainty of the exact factor that causes your USB drive malfunctioning in this way, the demonstrated solutions are not all supposed to take effect. Hence, take some patience to implement each solution until the problem solved.

1. Use Hardware and Devices troubleshooter

  • Press Win+R, type Control Panel and hit Enter.
  • Inside Control Panel in the search box type troubleshooter and select Troubleshooting.
  • After that select Configure a device under Hardware and Sound and follow the on-screen instruction.
  • Click on Apply this fix if any problem is found.

If the unknown USB device error is triggered by hardware issues, it will no longer appear after you try the above steps. If not, you need to move on to the next method to find a fix.

2. Try to Uninstall USB Drivers

  • Open Device Manager (Right Click on Windows Logo and Click Device Manager).
  • Now find and expand Universal Serial Bus controllers. Now right-click on USB drivers and click Uninstall. Do for all USB drivers one by one.
  • Restart your PC then Windows will reinstall the device automatically.

Some people would find that uninstalling and reinstalling the driver only works once. The next time they plug in the drive, and the device descriptor request failed appears again. According to an experienced user who has been suffering the problem for long but finally found the cause of why this method does not work and how to make it work.

I found that going into Device Manager and 'Uninstalling the device', and then plugging in the USB I had been using at the time, before telling Device Manager to scan for hardware changes in the USB ports fixed this problem. I think it was because I've had this USB receiver for a mouse plugged into it for so long, that when I removed it from the port, the computer didn't recognize that it'd been removed and got caught in a loop trying to identify a device that wasn't there anymore, locking the USB port down. Works fine now.

3. Disable Fast Startup

  • Press Win+R, type Control Panel and hit Enter.
  • Click on Power Options and select Choose what the power buttons do in the left pane.
  • Click on Change settings that are currently unavailable.
  • Under Shutdown settings, uncheck the box next to Turn on fast startup (recommended). Then click on the Save changes button.

4. Turn on Plug and Play in Windows Services

  • Press Win+R, type services.msc and hit Enter.
  • In Windows Services, find the name Plug and Play. Double-click on it to open the Properties window.
  • If the Startup type is currently Manual and the Service status is Running, try to turn it to Disabled and Stopped, save the changes; later change the Disabled and Stopped to Manual and Running again. Click OK and Apply.
  • If the Startup type is currently Disabled and the Service status is Stopped, switch to Manual and Running. Click OK and Apply.

Restart your PC and see if the unknown USB device problem has been resolved in Windows 10. if it doesn't work, try to perform a system restore to get rid of this issue.

5. Restore Your PC To Previous Recovery Points

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  • Press Win+R, type Control Panel and hit enter.
  • Now find and open the Recovery option.
  • Select System Restore, follow the on-screen guide and wait until all the recovery points are shown.
  • Restore your PC from the right recovery point.

Unknown devices show up in the Windows Device Manager when Windows can’t identify a piece of hardware and provide a driver for it. An unknown device isn’t just unknown — it’s not functioning until you install the right driver.

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Windows can identify most devices and download drivers for them automatically. When this process fails — or if you disable automatic driver downloads — you’ll have to identify the device and hunt the driver down on your own.

Locate the Unknown Device

RELATED:How to Use the Windows Device Manager for Troubleshooting

You’ll see information about Unknown Devices in the Device Manager. To open it on Windows 10, 8.1, or 8, right-click in the bottom-left corner of the screen or press Windows Key + X and select Device Manager. On Windows 7, press Windows Key + R, type devmgmt.msc into the Run dialog, and press Enter. The Device Manager can also be accessed from the Control Panel or with a search from your Start menu or Start screen.

You’ll find unknown devices and other non-functioning devices under Other devices. Each device with a problem has a little yellow exclamation mark over its icon.

Such devices will often have the name “Unknown device,” but they’ll sometimes have a more descriptive name. For our purposes, the difference doesn’t matter. Although we may be able to see a name for the device, Windows doesn’t know what it is and we don’t know specifically which drivers we need for it.

Find the Unknown Device’s Hardware IDs

Now let’s identify the device. Right-click the unknown device and select Properties to view more information.


Windows will inform you it doesn’t have the appropriate drivers — that’s error code 28.

Click the Details tab, click the Property box, and select Hardware Ids in the list. Windows displays a lot of other information about the device here, but the Hardware Ids will help you identify the device.

You’ll usually see a list of long strings of characters here. Just looking at them won’t tell you much, but they’re actually unique hardware IDs that correspond to the hardware.

Perform a web search for the hardware ID using your favorite search engine. You should find the name of the piece of hardware associated with the unknown device, and that will give you the information you need to hunt down the driver.


Here, we can see that the device is a Nexus 4 or Nexus 7 (2013) with USB Debugging enabled, so we’d need to install the ADB drivers. Windows will then recognize the ADB interface and the device will be a properly installed, “known device.”

Install the Driver

You can now hunt down the driver for the hardware device and install it normally. You shouldn’t have to mess with the Device Manager here — just install the driver using the standard installer and it should work.

If you have to manually install a driver for the device — perhaps the driver is already installed on your system — you can use the Update Driver button in the device’s Properties window. If the device driver is already installed on your system, click the “Browse my computer for driver software” link and choose an installed driver.

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Automatically Identify Devices and Install Drivers

RELATED:Should You Use the Hardware Drivers Windows Provides, or Download Your Manufacturer's Drivers?


Windows attempts to automatically install drivers, searching for appropriate drivers and downloading them from Windows Update. Windows wants to identify hardware and install drivers so you don’t have to do this. If you’ve disabled this feature, you might encounter more unknown devices.

To check whether this feature is enabled or disabled, open the Control Panel and click View devices and printers under Hardware and Sound. Right-click the device that represents your computer itself and select Device installation settings.

Ensure “Yes, do this automatically (recommended)” or at least “Always install the best driver software from Windows Update” is selected. These are the default settings, and allow Windows to download drivers and automatically configure new hardware.

After enabling this setting, click the Update Driver button in a device’s properties window in Device Manager. You’ll be able to search for drivers from Windows Update — this should happen automatically after you connect the device to the PC, but you may want to try it again if you’ve just re-enabled the feature.


Unknown Device Driver Free Download

Windows Update doesn’t have every driver for every device ever created. You’ll sometimes have to hunt the driver down on your own.

Unknown devices are often a problem after reinstalling Windows on a PC. If Windows can’t find all the drivers for your PC’s hardware, you’ll need to hunt down the drivers and install them yourself. They shouldn’t be a problem later on unless you upgrade your PC’s components or connect more exotic peripherals to it.

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