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Windows may be missing other important updates hardware or software issues.Your PC requires an update for issues that may conflict with a USB external hard drive and Windows.The currently loaded USB driver has become unstable or corrupt.This issue can be caused if any of the following situations exist: USB Device not recognized: One of the devices attached to this computer has malfunctioned and windows does not recognize it.Īpplies to: Windows 10, version 1709, Windows 7 Service Pack 1 Original KB number: 2654149 Cause When you try to access data on an external USB hard drive, you may receive the following error: This article provides methods to solve the USB Device not recognized error that occurs when you try to access a USB external hard drive.