Some applications and services appear to stop responding for 15 seconds after you install a Windows Filtering Platform driver on a Windows Vista-based computer
On This PageSYMPTOMSConsider the following scenario.
You develop a Windows Filtering Platform (WFP) driver. You install the WFP driver on a Windows Vista-based computer.
In this scenario, some applications and services appear to stop responding for 15 seconds when a Domain Name System (DNS) lookup occurs.
This problem occurs if the applications or the services use the DNS function. CAUSEThis problem occurs because of an error in the Application Layer Enforcement (ALE) component.
After the Getaddrinfo function receives a DNS response, Getaddrinfo tries to close a socket. At the same time, the ALE component detects that some pending net buffer lists (NBLs) exist in Windows Vista. Then, the ALE component puts the socket in a queue. The socket stays in the queue for 15 seconds. Therefore, the applications or the services appear to stop responding for 15 seconds. RESOLUTIONUpdate informationTo resolve this problem, apply the update on the Windows Vista-based computer. This update removes the code where the ALE component put the socket in the queue.The following files are available for download from the Microsoft Download Center: Windows Vista, 32-bit versions Download the 929547 package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=101BA074-12C1-46B3-8AF6-159AFEE195B9)Windows Vista, 64-bit versionsDownload the 929547 package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=CA1C0A89-8B93-48A8-A74A-DA05B126217A)Release Date: August 28, 2007 For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base: 119591 (http://support.microsoft.com/kb/119591/) How to obtain Microsoft support files from online services
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PrerequisitesThere are no prerequisites for installing this update.Restart requirementYou must restart the computer after you apply this update.Update replacement informationThis update does not replace a previously released update.Registry informationTo use one of the updatees in this package, you do not have to make any changes to the registry.File informationThe English version of this update 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
Windows Vista, 64-bit versions
STATUSMicrosoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. REFERENCES
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 (http://support.microsoft.com/kb/824684/)
Description of the standard terminology that is used to describe Microsoft software updates
For more information about the Getaddrinfo function, visit the following Microsoft Web site: http://msdn2.microsoft.com/en-us/library/ms738520.aspx (http://msdn2.microsoft.com/en-us/library/ms738520.aspx) For more information about WFP, visit the following Microsoft Web sites: http://www.microsoft.com/whdc/device/network/WFP.mspx (http://www.microsoft.com/whdc/device/network/WFP.mspx) http://msdn2.microsoft.com/en-us/library/aa363967.aspx (http://msdn2.microsoft.com/en-us/library/aa363967.aspx) APPLIES TO
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