Microsoft KB Archive/307271

= Patch Available for USB Isochronous Data Transfers Issues =

Article ID: 307271

Article Last Modified on 5/17/2007

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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 Q307271



SYMPTOMS
You may experience one or more of the following problems in Windows XP:
 * When you are listening to audio over Universal Serial Bus (USB) speakers, you may hear a pop. This may occur from every few seconds to every few minutes.
 * When you are connected to the Internet via an USB modem, you may encounter data transfer errors or even lose connection during heavy transfers.



CAUSE
This issue occurs because frames are being dropped on the USB bus during isochronous data transfers. This may affect functionality of any USB device using this mode of data transfer.



RESOLUTION
To resolve this problem, obtain the latest service pack for Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

322389 How to Obtain the Latest Windows XP Service Pack

Microsoft has released an update to address this problem. You can apply a software update either during or after Windows XP Setup.

Apply Software Update During Windows XP Setup
To prevent this issue from occurring when you upgrade to Windows XP, click Yes, download the updated Setup files (Recommended) in the Get Updated Setup Files dialog box during Setup, and then click Next.

NOTE: Corporate Administrators can deploy Dynamic Update for Windows XP Professional Setup in a corporate environment so that clients do not have to connect to the Windows Update Web site during Windows XP Setup. For additional information about how to do this, click the article number below to view the article in the Microsoft Knowledge Base:

311220 Description of the Dynamic Update Feature in Windows XP Setup

The following file is available for download from the Microsoft Download Center:

Download Q314582_wxp_sp1_x86_enu.exe now

Release Date: February 6, 2002

For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to Obtain Microsoft Support Files from Online Services

Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file. The English-language version of this fix should have the following file attributes or later:   Date         Time   Version      Size    File name    Platform 06-Sep-2001 11:00  5.1.2600.11  18,944  Usbuhci.sys  i386 06-Sep-2001 11:00  5.1.2600.11  67,072  Usbuhci.sys  Itanium 64-bit

Apply Software Update After Windows XP Setup
If you did not download the updated Setup files during the Setup procedure, you can obtain the patch from the Microsoft Download Center.

The following file is available for download from the Microsoft Download Center:

Download Q316397_wxp_sp1_x86_enu.exe now

Release Date: February 25, 2002

For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to Obtain Microsoft Support Files from Online Services

Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on secure servers that prevent any unauthorized changes to the file.

The English-language version of this software update should have the following file attributes or later:   Date         Time   Version      Size     File name --

12-Oct-2001 14:10  5.1.2601.0   139,264  Aec.sys 11-Dec-2001 16:43  5.1.2600.16  844,288  Dxmrtp.dll 06-Feb-2002 15:41  5.1.2600.28  549,888  Rtcdll.dll 12-Oct-2001 14:22  5.1.2600.16    6,016  Splitter.sys 27-Nov-2001 14:20  5.1.2600.21   56,832  Usbaudio.sys 30-Jan-2002 18:07  5.1.2600.28   19,200  Usbuhci.sys NOTE: The original version of this software update has been superseded by the Windows Messenger Update for Audio/Video and Voice.Net. For additional information about the new patch, click the article number below to view the article in the Microsoft Knowledge Base:

316397 Windows XP Real-Time Communication Client Support for Network Address Translation



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section. This problem was first corrected in Windows XP Service Pack 1.

Additional query words: USB Speakers Make a &quot;Pop&quot; Sound When You Play Audio

Keywords: kbhotfixserver kbqfe kbenv kbbug kbfix kboswin2000fix kbwinxpsp1fix KB307271

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