Universal Serial Bus Device Not Recognized

You're reading Universal Serial Bus Device Not Recognized, posted on Wednesday, February 16th, 2011 at 7:34 am in Hardware, on BrainBloggers at the Technology blog. More after the jump.

USB device not recognized is actually a windows error which presents itself on the screen after a user attempts to link an external device to the system. It means that the computer hasn’t recognized the USB device plugged into the system. The USB device may possibly belisted as an unknown device in Device Manager if this scenario takes place.

Root causes
The flaw may emerge because of one or more of the following factors:

Affixed hubs
Faulty USB driver versionsNo support for USB 2.0
Affixed devices
Additional system hardware or configurations which could adjust the timing
Breakdown of the host controller hardware


In a bid to eliminate the problematic issues causing the error the methods below may be applied

1. An unsecure or loose connection is one of the most popular reasons for the error USB device not recognized.
The operator should remove the current USB device from the computer system should one be attached. This is done in the eventuality that the connection is not secure and has now 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 through the manipulation of the Device Manager. This is accomplished by navigating from the start menu to the ‘run’ option. After the ‘run’ option is chosen the characters Devmgmt.msc should be entered into the pop up box. The option ‘OK’ should then be selected. By using the action menu, the user should subsequently click ‘scan for hardware changes’. This step should induce windows to scan as well as recognize any devices that were recently installed. Just after this action has been executed the user should close all control panels and opened device managers. Shortly after completing the steps in this process the user should make an effort to verify whether the system has begun to recognize the USB devices or devices.

3. USB Hub Power Management
flaw correcting technique consists of the disabling of the power management of the USB hub. The steps below should enable a user to satisfactorily disable the power management on the USB hub

A. Click Start, followed by ‘Run’.

B. Type devmgmt.msc in the popup box, after which you can click Ok. Expand the Universal Serial Bus Controllers’ node,

C. Now execute the measures below for each listed USB Root Hub:

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

2. Select the Power Management tab.

3. Hit to clear the ‘Allow the computer to turn off this device to save power’ check box, followed by clicking Ok.

Consumers should be aware that performing the procedure below on a laptop computer may result in a reduction in the battery life.The issue can sometimes be resolved by removing the USB device, shutting down the system for a period of twenty minutes before restarting it.

Extra Tips

In the event that all the solutions fail, the user should contact the manufacturer for new driver information. This is required since the drivers may need to be updated. What’s more a hardware failure could exist and in such a case the expertise of a hardware expert is required.