Open Software Solutions

On a computer that is running Windows Vista, you modify the TcpAckFrequency registry entry by following the steps that are described in Microsoft Knowledge Base article 328890. However, the behavior of TCP acknowledgments (ACKs) does not change.

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Hotfix information

Prerequisites

There are no prerequisites.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

Registry information

You do not have to make any changes to the registry.

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 item in Control Panel.

Windows Vista, 32-bit versions

File name	File version	File size	Date	Time	Platform
Netiomig.dll	6.0.6000.20571	49,152	03-Apr-2007	12:51	x86
Netiougc.exe	6.0.6000.20571	22,016	03-Apr-2007	12:04	x86
Tcpip.sys	6.0.6000.20571	803,328	03-Apr-2007	12:05	x86
Tcpipcfg.dll	6.0.6000.20571	167,424	03-Apr-2007	12:51	x86

Windows Vista, 64-bit versions

File name	File version	File size	Date	Time	Platform
Netiomig.dll	6.0.6000.20571	59,904	03-Apr-2007	14:03	x64
Netiougc.exe	6.0.6000.20571	25,600	03-Apr-2007	12:35	x64
Tcpip.sys	6.0.6000.20571	1,193,472	03-Apr-2007	12:36	x64
Tcpipcfg.dll	6.0.6000.20571	232,960	03-Apr-2007	14:03	x64

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

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For more information about the TcpAckFrequency registry entry, click the following article numbers to view the articles in the Microsoft Knowledge Base:

•	328890 (/Feedback.aspx?kbNumber=328890/) New registry entry for controlling the TCP Acknowledgment (ACK) behavior in Windows XP and in Windows Server 2003
•	823764 (/Feedback.aspx?kbNumber=823764/) Slow performance occurs when you copy data to a TCP server by using a Windows Sockets API program

For more information about TCP/IP registry values in Windows Vista and in Windows Server Code Name Longhorn, see the TCP/IP Registry Values for Microsoft Windows Vista and Windows Server ‘Longhorn’ white paper. To obtain this white paper, visit the following Microsoft Web site:

For more information about the terms that are used to describe software updates, click the following article number to view the article in the Microsoft Knowledge Base:

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