In this video, we're going to show you how to fix Unknown USB Device (Device Descriptor Request Failed) Error. We can solve the problem by reinstalling the U.
If your computer doesn't recognize your connected device, you might see an unknown error or a '0xE' error. If you do, follow these steps and try to connect your device again after each step:
- Make sure that your iOS or iPadOS device is unlocked and on the Home screen.
- Check that you have the latest software on your Mac or Windows PC. If you're using iTunes, make sure you have the latest version.
- Make sure that your device is turned on.
- If you see a Trust this Computer alert, unlock your device and tap Trust.
- Unplug all USB accessories from your computer except for your device. Try each USB port to see if one works. Then try a different Apple USB cable.*
- Restart your computer.
- Restart your device:
- Try connecting your device to another computer. If you have the same issue on another computer, contact Apple Support.
For more help, follow the steps below for your Mac or Windows PC.
* Learn how to connect iPad Pro (11-inch) or iPad Pro 12.9-inch (3rd generation) to your computer.
If you use a Mac
- Connect your iOS or iPadOS device and make sure that it's unlocked and on the Home screen.
- On your Mac, hold down the Option key, click the Apple menu, and choose System Information or System Report.
- From the list on the left, select USB.
- If you see your iPhone, iPad, or iPod under USB Device Tree, get the latest macOS or install the latest updates. If you don't see your device or still need help, contact Apple Support.
- You need to install the driver package and select the ZDesigner ZD410-203dpiZPL printer. Then select Next. Select USB for the port, then Next. Open QuickBooks Desktop Point of Sale to finish setting up the Zebra Tag Printer. To set up, go to the File menu then select Hardware Setup Wizard.
- Here, you can download User's Manuals, Drivers, Utilities, SDKs and more. Go here for files related to peripheral equipment.
If you use a Windows PC
The steps differ depending on if you downloaded iTunes from the Microsoft Store or from Apple.
If you downloaded iTunes from the Microsoft Store
Follow these steps to reinstall the Apple Mobile Device USB driver:
- Disconnect your device from your computer.
- Unlock your iOS or iPadOS device and go to the Home screen. Then reconnect your device. If iTunes opens, close it.
- Click and hold (or right-click) the Start button, then choose Device Manager.
- Locate and expand the Portable Devices section.
- Look for your connected device (such as Apple iPhone), then right-click on the device name and choose Update driver.
- Select 'Search automatically for updated driver software.'
- After the software installs, go to Settings > Update & Security > Windows Update and verify that no other updates are available.
- Open iTunes.
If you downloaded iTunes from Apple
Follow these steps to reinstall the Apple Mobile Device USB driver:
- Disconnect your device from your computer.
- Unlock your iOS or iPadOS device and go to the Home screen. Then reconnect your device. If iTunes opens, close it.
- Press the Windows and R key on your keyboard to open the Run command.
- In the Run window, enter:
%ProgramFiles%Common FilesAppleMobile Device SupportDrivers
- Click OK.
- Right-click on the
usbaapl64.inf
orusbaapl.inf
file and choose Install.
You might see other files that start withusbaapl64
orusbaapl
. Make sure to install the file that ends in .inf. If you’re not sure which file to install, right-click a blank area in the File Explorer Window, click View, then click Details to find the correct file type. You want to install the Setup Information file. - Disconnect your device from your computer, then restart your computer.
- Reconnect your device and open iTunes.
If your device still isn't recognized
Check Device Manager to see if the Apple Mobile Device USB driver is installed. Follow these steps to open Device Manager:
- Press the Windows and R key on your keyboard to open the Run command.
- In the Run window, enter
devmgmt.msc
, then click OK. Device Manager should open. - Locate and expand the Universal Serial Bus controllers section.
- Look for the Apple Mobile Device USB driver.
If you don't see the Apple Mobile Device USB Driver or you see Unknown Device:
- Connect your device to your computer with a different USB cable.
- Connect your device to a different computer. If you have the same issue on another computer, contact Apple Support.
If you see the Apple Mobile Device USB driver with an error symbol:
Install Driver For Usb Device
If you see , , or next to the Apple Mobile Device USB driver, follow these steps:
- Restart the Apple Mobile Device Service.
- Check for and resolve issues with third-party security software, then restart your computer.
- Try to install the
usbaapl64.inf
orusbaapl.inf
file again.
Category: USB
Manufacturer: Citizen
Caution Level: safe
Download File Size: 16.2 MB
Operating System: Windows 98/Me/NT/2000/XP
Latest Version / Release Date: 1.0.0.1 / 04 Aug 2009
Windows device driver information for Citizen X1-USB Floppy
The Citizen X1-USB Floppy package comes with a wide variety of additional features including an extension for the Swivel adapter, a cordless universal serial host adapter, a compact disc with installation guidelines and the supporting driver, and a quick start user manual. Many of the features of the Citizen X1-USB Floppy are compatible with many versions of Windows operating system as highlighted above but best results can be realized when Windows XP Service Pack 2 and other advanced versions are used. The Citizen X1-USB Floppy supports the performance of wireless USB hubs that are sold separately and has a notable efficiency in transmission of data at rates as high as 480 megabytes per second and supports the connectivity and usability of wireless devices within a range of 30 feet.

Outdated Drivers?
Unless you update your drivers regularly you may face hardware performance issues.
Drivers Citizen USB Devices
To check your drivers you should manually verify every device on your system for driver updates

Usb Device Manager
The Citizen X1-USB Floppy is a wireless equipment that facilitates communication of USB enabled devices via certified wireless universal serial bus interfaces. The Citizen X1-USB Floppy is designed in such a manner that the use of many dangling cables has been avoided. Thus the Citizen X1-USB Floppy does not have the cable clutter characteristics that are common with many USB universal adapter devices. The wireless capability of the Citizen X1-USB Floppy devices enables users to roam a distances of up to 30 feet, thus making it ideal for use in shared office environments. With its compatibility characteristics, the Citizen X1-USB Floppy can be used with printers, copying machines, digital cameras and a wide array of other office devices. The Citizen X1-USB Floppy does not support the functionality of speakers and Bluetooth devices. It is highly recommended you run a free registry scan for Windows and Citizen X1-USB Floppy errors before installing any driver updates.

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