Microsoft KB Archive/327863

= Stop Error 0x7E Occurs in Usbhub.sys If USB Bandwidth Consumption Exceeds 100 Percent =

Article ID: 327863

Article Last Modified on 10/27/2006

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APPLIES TO


 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Professional

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This article was previously published under Q327863



SYMPTOMS
If you connect a Universal Serial Bus (USB) input device (such as a keyboard or mouse) to a Windows XP-based computer on which Windows XP Service Pack 1 (SP1) or the USB 2.0 update is installed, you may receive the following error message while you are streaming USB audio or video:

STOP: 0x0000007E (0xC0000005,,  ,  )

usbhub.sys

Note that the second, third, and fourth parameters in the error message may vary.

This problem may occur if USB bandwidth consumption exceeds 100 percent when you connect the USB input device. When this problem occurs, your computer may restart.



CAUSE
Exceeding the maximum USB bandwidth during the enumeration of a new device exposes a lack of protection that is related to device removal.



RESOLUTION
To work around this issue, use any of the following methods:
 * Connect your USB keyboard or mouse before you start streaming USB video or audio.
 * If you have already started streaming USB video or audio, stop the stream, connect the USB keyboard or mouse, and then start the stream again.
 * If your computer has multiple USB host controllers, connect the keyboard or mouse to a USB port that is connected to a host controller other than the host controller to which the USB video or audio device is connected. Most computer that were sold in the last year have two or more USB host controllers. To verify this, view the USB host controllers in Device Manager.



STATUS
Microsoft is researching this problem and will post more information in this article when the information becomes available.

Keywords: kbhotfixserver kbqfe kbprb KB327863

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