Microsoft KB Archive/937385

= The Winsock connection fails when the program calls the setsockopt function in Windows Vista =

Article ID: 937385

Article Last Modified on 8/29/2007

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APPLIES TO


 * Windows Vista Ultimate
 * Windows Vista Home Premium
 * Windows Vista Home Basic
 * Windows Vista Enterprise
 * Windows Vista Business
 * Windows Vista Business 64-bit Edition
 * Windows Vista Ultimate 64-bit Edition
 * Windows Vista Home Premium 64-bit Edition
 * Windows Vista Home Basic 64-bit Edition
 * Windows Vista Enterprise 64-bit Edition

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SYMPTOMS
A program opens a Winsock connection on a Windows Vista-based computer. However, the Winsock connection fails when the program calls the setsockopt function. This problem occurs if the program uses Transport Data Interface (TDI) filter drivers.

When this problem occurs, some network applications may not function correctly. For example, a user cannot use Remote Assistance to receive assistance from a remote computer. Specifically, the Remote Assistance connection is dropped shortly after the user accepts the Remote Assistance invitation. Then, the user receives the following error message:

Windows Remote Assistance is closing. An unknown error occurred so the session was disconnected.

Try restarting your session. If you continue to get this message, contact your administrator or technical support.

Additionally, the following event is logged in the Application log: Source: Microsoft-Windows-RemoteAssistance

Date:

Event ID: 3

Task Category: None

Level: Critical

Keywords:

User:

Computer:

Description: Application will terminate, a critical error was detected in \novinterdialog.cpp Line   Function OnErrorProc



CAUSE
This problem occurs because Windows Vista uses a compatibility layer that is called TDX to support TDI filter drivers. TDX generates an error when the setsockopt function is called.



Hotfix information
A supported hotfix is now 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 service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

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

Prerequisites
No prerequisites are required.

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

Hotfix replacement information
This hotfix replaces hotfix 933049. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

933049 A Winsock connection may fail when the program that opens the connection calls the Setsockopt function in Windows Vista

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, 64-bit versions


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



MORE INFORMATION
TDI filter drivers are network drivers and transport drivers that antivirus products or antispyware products frequently use. Operating systems that are earlier than Windows Vista mostly use the TDI filter drivers. Windows Vista uses a compatibility layer that is called TDX to support the TDI filter drivers. For more information about TDI drivers, visit the following Microsoft Developer Network (MSDN) Web site:

http://msdn2.microsoft.com/en-us/library/aa505007.aspx

For more information about the setsockopt function, visit the following MSDN Web site:

http://msdn2.microsoft.com/en-us/library/ms740476.aspx

For more information about the Windows Filtering Platform, visit the following Microsoft Web site:

http://www.microsoft.com/whdc/device/network/WFP.mspx

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

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbbug kbfix kbqfe kbpubtypekc kbexpertiseinter kbhotfixserver kbwinvistapostrtmfix KB937385

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