Error in Windows XP: Power Surge on Hub Port

This document applies to HP and Compaq desktop PCs with Windows XP.

When you plug a USB device into a powered USB hub or into the USB port on your PC, one of the following errors occurs:

The device is not available for use or does not receive power.


The following error message displays:
USB Hub Power Exceeded

This problem can occur if a high-power USB device (such as a USB hard disk) is plugged in to a PC that supports either an Intel ICH5 or ICH6 (I/O Controller Hub) system, and the USB device consumes more than 500 milliamps (mA) power.

Resolving the error

Resolve this error by connecting an external power source to power the USB device (if the device supports an external power source), or plugging the USB device into a self powered USB hub.

Related suport
When you wake up a Microsoft Windows XP-based computer from hibernation or from standby, you may receive the following error message:Power Surge on Hub Port: A USB Device has exceeded the power limits of its hub port.
This error message is displayed even if there are no USB devices connected to the computer.


To work around this issue, disable the USB 2.0-enhanced host controller. 

Note When you disable the USB 2.0-enhanced host controller, you lose USB 2.0 functionality. That is, you revert to USB 1.1 functionality. 

To disable the USB 2.0-enhanced host controller, follow these steps:

1. Right-click My Computer, and then click Manage.
2. Under Computer Management (Local), click Device Manager.
3. In the Device Manager pane, expand Universal Serial Bus controllers.
4. Right-click the USB 2.0-enhanced host controller, and then click Disable. 
   
   Note The name of the USB 2.0-enhanced host controller may vary.
5. When you receive the confirmation message, click Yes.
6. Close Device Manager.

Read More....