Windows won't detect external storage devices

March 2018

My laptop has recently stopped detecting external storage devices. When plugged-in to the computer, there's a small notification indicating that a device has been connected, but it won't appear under My Computer.


This problem may happen when USB ports has been disabled! to enable just follow these steps, to enable them:
  • Click Start, and then click Run.
  • In the Open box, type regedit, then click OK.
  • Locate, and then click the following registry key:
    • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\UsbStor 
  • In the right pane, double-click Start.
  • In the Value data box, type 3, click Hexadecimal (if it is not already selected), and then click OK.
  • Quit Registry Editor.

Thanks to moneymaker1 for this tip.
Published by deri58. Latest update on October 13, 2014 at 12:37 PM by Jeff.
This document, titled "Windows won't detect external storage devices," is available under the Creative Commons license. Any copy, reuse, or modification of the content should be sufficiently credited to CCM (
Microsoft Visual C++ Debug Library error message
Windows Update - Error 0x80244019