Microsoft KB Archive/310591

= &quot;USB Power Exceeded&quot; Error Message When Connecting USB Devices =

Article ID: 310591

Article Last Modified on 12/1/2007

-

APPLIES TO


 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Professional
 * Microsoft Windows XP Professional x64 Edition

-



This article was previously published under Q310591





SYMPTOMS
When you attach a Universal Serial Bus (USB) device, you may receive a &quot;USB Hub Power Exceeded&quot; error message that contains the following text:

The hub does not have enough power available to operate the. Would you like assistance in solving this problem? If you click No, the device may not function properly.

In addition, the USB device mentioned in the error message does not work properly and the device listing (located in the System properties of the Device Manager properties window for the device) is displayed with the following error message:

A USB device has requested more power than the hub can provide. Windows cannot enable the device. Remove the device and restart your computer.



CAUSE
This behavior occurs if there are too many USB devices attached to a passive (unpowered) USB hub.



RESOLUTION
To resolve this issue, replace the passive USB hub with an active (powered) hub.



WORKAROUND
To work around this issue, disconnect the affected device from the passive hub and connect it directly to the USB host controller's hub (in the back of the computer).

Keywords: kberrmsg kbhardware kbprb kbprod2web KB310591

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.