Universal Serial Bus Device Not Recognized

USB device not recognized can be described as windows error which appears on the screen after a user attempts to link an external device to the system. It occurs if the computer hasn't recognized the USB device plugged into the system. The USB device could possibly belisted as an unknown device in Device Manager if this condition emerges.

Causative factors
The flaw may emerge on account of one or more of the following factors:

Connected hubs
Malfunctioning USB driver modelsNo support for USB 2.0
Hooked up devices
Supplementary system hardware or configurations which can modify the timing
Breakdown of the host controller hardware

Strategies
In order to eliminate the issues identified above the following solutions may need to be applied:

1. An unsecure or loose connection is probably the more popular factors behind the error USB device not recognized.
The operator should detach the current USB device from the computer in the situation where one is attached. This is done because it is possible that the connection is not firm and has become loose. The device should then be re attached to the system firmly through the USB port.

2. Scan in order to access hardware changes in device manager that may be causing a situation in which the USB device is not recognized.
The user should scan for recently installed hardware by manipulating the Device Manager. This is achieved by navigating from the start menu to the 'run' option. Right after the 'run' option is chosen Devmgmt.msc should be typed into the pop up box. The option 'OK' should then be selected. Using the action menu, the computer owner should then click 'scan for hardware changes'. This action should cause windows to scan and find any newly installed devices. Immediately after this has been completed the user should close all control panels and opened device managers. Shortly after completing the steps in this process the user should try to ascertain if the system has become able to recognize the USB devices or devices.

3. USB Hub Power Management
error addressing technique demands the disabling of the power management of the USB hub. These steps should be undertaken in order to disable the power management on the USB hub:

A. Click Start, and subsequently 'Run'.

B. Enter the characters devmgmt.msc in the popup box, and after that click Ok. Expand the Universal Serial Bus Controllers' node,

C. The next course of action is to follow the guidelines below for each listed USB Root Hub:

1. Use the right-click mouse feature on the USB Root Hub and then select (by clicking) Properties.

2. Click the Power Management tab.

3. Mouse click to clear the 'Allow the computer to turn off this device to save power' check box, followed by clicking Ok.

It should be noted that implementing the method below on a laptop computer may cause the battery life to be shortened.Sometimes simply unplugging the USB device and shutting down the computer for twenty minutes before restarting it may satisfactorily resolve the issue.

More Information
If application of all the solutions fail then the user is advised to contact the manufacturer for new driver information This is important since the drivers may be in need of updating. In addition a hardware failure could exist and in such a case the service of a hardware expert is required.

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