How to fix “USB device not recognized”

Have you seen this error message after connecting a USB device to your computer?

USB Device Not Recognized

USB Device Not Recognized

Perhaps you’re seeing this nettlesome error after plugging in your USB mouse or maybe it spontaneously appeared after installing Samsung Kies? People sometimes see it after inserting a USB flash drive, external hard drive or USB hub.  Fortunately this is common problem with a surprisingly simple solution.

Don’t bother with chkdsk.exe, regedit or third-party software.  Also forget about using System Restore, Driver reinstallations or digging through the Device Manager.  Instead do this simple trick to fix the problem:

  1. Power down your laptop or desktop
  2. Physically unplug the computer.  If it’s a laptop, remove the battery too.
  3. Leave it disconnected for three minutes
  4. Replug the desktop or reinsert the battery
  5. Power on the system

Why it works

The key to making this work is to completely remove all power to the system.  The USB ports on your computer are physically soldered to the motherboard and the motherboard gets its juice from the power supply.   On modern PC’s, when you click Shutdown or press the Power Button, the microprocessors on the motherboard still have vestiges of power.  The capacitors on the system board still has latent power; therefore, when you reboot the system or do a soft shutdown the computer doesn’t actually reset the power to the system board because the capacitors are still storing electricity.

Physically removing the battery and power plug and leaving it disconnected for three minutes gives the capacitors the requisite time to discharge and therefore does a true reset to the motherboard.

Please share your victories in the comments  below!

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Posted in Desktops, Hardware, Laptops, Windows, Windows 7, Windows 8, Windows 8.1
  • mentalmen

    this worked for me before but now it is not working

    • adam juneau

      same here m8

  • Sanduni Wijesinghe

    same here. not working