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Article ID: 815230 - Last Review: August 29, 2007 - Revision: 8.2

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SYMPTOMS

After you follow the steps in the Microsoft Knowledge Base article 328890 to set the TcpAckFrequency registry entry to the value of 1, you do not see any difference in the delayed TCP Acknowledgment (ACK) behavior of the computer where you modified this entry.

For additional information about this behavior, click the following article number to view the article in the Microsoft Knowledge Base:
328890  (http://support.microsoft.com/kb/328890/ ) New registry entry for controlling the TCP Acknowledgment (ACK) behavior in Windows XP and in Windows Server 2003

RESOLUTION

Microsoft Windows Server 2003

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
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 file attributes) 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.Windows Server 2003, 32-bit editions
Date         Time   Version      Size     File name
----------------------------------------------------
11-Sep-2003  00:04  5.2.3790.84  333,824  Tcpip.sys
Windows Server 2003, 64-bit editions
Date         Time   Version      Size     File name
----------------------------------------------------
11-Sep-2003  00:00  5.2.3790.84  969,728  Tcpip.sys

Microsoft Windows XP

Service pack information

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  (http://support.microsoft.com/kb/322389/ ) How to obtain the latest Windows XP service pack

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
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 file attributes) 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.Windows XP
Date         Time   Version        Size     File name
------------------------------------------------------
11-Sep-2003  21:35  5.1.2600.1267  333,440  Tcpip.sys
Windows XP, 64-bit edition
Date         Time   Version        Size       File name
-------------------------------------------------------
11-Sep-2003  21:16  5.1.2600.1267  1,093,248  Tcpip.sys

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

Windows XP

This problem was first corrected in Windows XP Service Pack 2.

APPLIES TO
  • Microsoft Windows Server 2003, Web Edition
  • Microsoft Windows Server 2003, Standard Edition (32-bit x86)
  • Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
  • Microsoft Windows Server 2003, Enterprise x64 Edition
  • Microsoft Windows XP Home Edition
  • Microsoft Windows XP Professional
  • Microsoft Windows XP 64-Bit Edition Version 2003
Keywords: 
kbautohotfix kbhotfixserver kbqfe kbbug kbfix kbqfe kbwinserv2003presp1fix KB815230
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