※一部リンクに紹介を含みます

Windows Does Not Recognize Your USB Device? Simple Fixes Anyone Can Try

Illustration showing a Windows laptop with USB connection error, a USB flash drive, and four troubleshooting icons, under the title "Fix USB Not Recognized". Flat design on light blue background.

You plug in a USB device… but nothing happens.

No sound. No popup. The USB drive, mouse, keyboard, or external SSD simply does not appear on your Windows PC.

Don’t worry — this problem is very common on both Windows 11 and Windows 10, and in many cases, the device is not permanently broken.

This guide explains simple step-by-step fixes anyone can try, even if you are not good with computers.

PR

Signs of This Problem

  • The USB device does not appear
  • Windows makes no sound when plugging it in
  • You see a “USB device not recognized” message
  • The mouse, keyboard, or USB drive suddenly stops working
  • The device works on another PC but not this one

Basic Checks Before You Start

  • Try another USB port (front/back, USB-A/USB-C if available)
  • Test the device on a different PC
  • If using a USB hub, connect directly to the PC

Step 1: Fully Restart Your PC

Sometimes Windows gets stuck and cannot detect USB devices correctly.

A full restart is often enough to fix the problem.

  1. Shut down your PC completely
  2. Wait about 30 seconds
  3. Turn it back on
  4. Plug the USB device in again

This simple step fixes more USB problems than many people expect.


Step 2: Disable USB Power Saving

  1. Right-click Start → Device Manager
  2. Expand Universal Serial Bus controllers
  3. Open USB Root Hub → Properties
  4. Uncheck “Allow the computer to turn off this device to save power”

PR

Step 3: Update or Reinstall USB Drivers

  1. Open Device Manager
  2. Right-click “Unknown device” or “USB Mass Storage Device”
  3. Select Uninstall device
  4. Restart your PC (Windows will auto-reinstall the driver)

Step 4: Check USB Settings in BIOS/UEFI

If your motherboard disables USB ports for security or power saving, check these:

  • USB Controller
  • Legacy USB Support
  • XHCI Hand-off

Make sure these are enabled before exiting BIOS.


Step 5: Run the Built-in Troubleshooter

  1. Open Settings → System → Troubleshoot → Other troubleshooters
  2. Run “USB” or “Hardware and Devices”

Step 6: Check for Interference from Other USB Devices

  • Disconnect other USB devices and test one by one
  • Remove wireless mouse adapters or dongles temporarily
  • Use a powered hub if connecting many devices

Advanced Fixes (Only If the Simple Steps Did Not Help)

The fixes below are a little more advanced, but they can help when USB problems keep coming back.

If you are not comfortable changing system settings, you can skip this section for now.

  • Disable USB Selective Suspend: Control Panel → Power Options → Change plan settings → Advanced → USB settings → disable

USB Problems After a Windows Update?

Some users notice USB problems after major Windows updates.

Older USB devices, external drives, and USB hubs may stop working correctly until drivers are updated or Windows settings are refreshed.

If the issue started immediately after an update, restarting the PC and reinstalling the USB driver often helps.


Why Windows Suddenly Stops Recognizing USB Devices

Many USB problems are temporary.

Windows updates, power-saving settings, driver glitches, and unstable USB hubs can sometimes confuse the connection.

In many cases, the USB device itself is not broken.

That is why simple fixes like restarting the PC, reconnecting the device, or reinstalling the driver often solve the issue quickly.


Summary Table: Causes and Solutions

CauseSolution
Physical port or cable issueTry another port or PC
USB powered off by WindowsDisable power saving
Driver corruptionUninstall/reinstall driver
USB disabled in BIOSEnable USB settings
Windows update conflictUninstall update or restore
Other devices interferingDisconnect and test

We hope this guide helps you fix your USB issue quickly! If you found it useful, please consider sharing it with others.

✔️You might also find these helpful:

▶︎What to Do When Windows Gets Stuck at “Installing Application”

▶︎Germany’s Shift from Windows: What It Means for the World

▶︎How I Fixed 100% Disk Usage on My Windows 11 Laptop (Fujitsu LIFEBOOK)

💡 Looking for more tips? Check out our full list of Windows Help Guides.