Microsoft KB Archive/842051

= You receive a Stop error message when you use a program that controls a USB IP phone device on a Windows 2000-based computer =

Article ID: 842051

Article Last Modified on 10/26/2006

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APPLIES TO


 * Microsoft Windows 2000 Professional Edition
 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server

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SYMPTOMS
When you use a program that controls a universal serial bus (USB) Internet Protocol (IP) phone device on a Windows 2000-based computer, your computer may stop responding and you may receive either of the following Stop error messages:

STOP OxA

STOP Ox1D



CAUSE
This problem may occur when the following conditions are both true:
 * The Windows 2000-based computer CPU is under high utilization.
 * Usbaudio.sys calls the IoCallDriver function with I/O request packets (IRPs) that are not initialized.



Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites
No prerequisites are required.

Restart requirement
You must restart your computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.   Date         Time   Version            Size    File name --  02-Jun-2004  00:14  5.0.2195.6935      68,688  Usbaudio.sys



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.

