◆Error Codes Wiki

USB Device Not Recognized — Unknown Device and Driver Failures on Windows

Warningdriver

Overview

Fix 'USB Device Not Recognized' error when Windows fails to identify connected USB devices due to driver issues, power problems, or port failures.

Key Details

  • The 'USB Device Not Recognized' error means Windows cannot identify the device connected to a USB port
  • Device Manager shows the device as 'Unknown Device' with a yellow warning triangle
  • USB power management settings may disable ports to save power, causing recognition failures
  • USB 3.0 devices may not work in USB 2.0 ports due to power or bandwidth requirements
  • Hub-connected devices may fail due to insufficient power distribution

Common Causes

  • Corrupted or outdated USB controller drivers in Device Manager
  • USB selective suspend power management disabling the port
  • Physical USB port damage or debris preventing proper electrical connection
  • Device requiring more power than the port or hub can provide

Steps

  1. 1Try a different USB port — preferably a rear port directly on the motherboard
  2. 2Uninstall the Unknown Device in Device Manager, then disconnect and reconnect the USB device
  3. 3Disable USB selective suspend: Power Options > Change plan settings > Advanced > USB settings > USB selective suspend > Disabled
  4. 4Update USB controller drivers: Device Manager > Universal Serial Bus controllers > right-click each > Update driver
  5. 5Try the device on another computer to determine if the issue is the device or the PC

Tags

usbdevice-not-recognizeddriverhardwareunknown-device

More in Driver

windows-code-10-device-cannot-startWindows Device Manager Code 10 — Device Cannot Start
Error
windows-code-28-driver-not-installedWindows Device Manager Code 28 — Driver Not Installed
Warning
windows-code-31-device-not-working-properlyWindows Device Manager Code 31 — Device Not Working Properly
Error
windows-code-43-device-stopped-workingWindows Device Manager Code 43 — Device Stopped Working
Error
windows-code-22-device-disabledWindows Device Manager Code 22 — Device Disabled
Informational
windows-code-39-driver-corrupted-or-missingWindows Device Manager Code 39 — Driver Corrupted or Missing
Error

Frequently Asked Questions

USB ports are connected to different controllers. A specific controller's driver may be corrupted. Also, front panel USB ports use internal cable extensions that may be damaged or provide less power.