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Symptoms

Consider the following scenario. You have a computer that is running Windows 7 or Windows Server 2008 R2. This computer has a third-party application installed that uses the Windows Filtering Platform (WFP) callout driver. In this scenario, you may receive an error message on a blue screen. This error message resembles the following:

STOP: 0x00000050 (parameter1, parameter2, parameter3, parameter4)

PAGE_FAULT_IN_NONPAGED_AREA

Notes

  • The parameters in this Stop error message may vary, depending on the configuration of the computer.

  • Not all "Stop 0x00000050" error messages are caused by this problem.


  • WFP callout drivers are typically used in third-party antivirus and firewall programs.

Cause

This problem occurs because of an error in the TCPIP.sys system driver. When the WFP callout driver calls the FwpsReleaseClassifyHandle0 function to free up some system resources, the Stop error occurs.

Resolution

Update information

How to obtain this update

A supported update is available from Microsoft.

If the update 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 update.

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 update. 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=supportNote The "Hotfix download available" form displays the languages for which the update is available. If you do not see your language, an update is not available for that language.

Prerequisites

To apply this update, you must be running Windows 7 or Windows Server 2008 R2.

Registry information

To use the update in this package, you do not have to make any changes to the registry.

Restart requirement

You must restart the computer after you apply this update.

Update replacement information

This update does not replace a previously released update.

File information

The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows 7 and Windows Server 2008 R2 file information notes


Important Windows 7 updates and Windows Server 2008 R2 updates are included in the same packages. However, updates on the Hotfix Request page are listed under both operating systems. To request the update package that applies to one or both operating systems, select the update that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each update applies to.

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.1.760
    0.16xxx

    Windows 7 and Windows Server 2008 R2

    RTM

    GDR

    6.1.760
    0.20xxx

    Windows 7 and Windows Server 2008 R2

    RTM

    LDR

  • GDR service branches contain only those fixes that are widely released to address widespread, extremely important issues. LDR service branches contain hotfixes in addition to widely released fixes.

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 R2 and for Windows 7" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintaining the state of the updated component. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows 7

File name

File version

File size

Date

Time

Platform

Fwpkclnt.sys

6.1.7600.16385

187,472

14-Jul-2009

01:20

x86

Tcpip.sys

6.1.7600.16512

1,288,192

27-Jan-2010

07:03

x86

Fwpkclnt.sys

6.1.7600.16385

187,472

14-Jul-2009

01:20

x86

Tcpip.sys

6.1.7600.20628

1,287,048

27-Jan-2010

06:55

x86

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Fwpkclnt.sys

6.1.7600.16385

288,336

14-Jul-2009

01:47

x64

Tcpip.sys

6.1.7600.16512

1,898,376

27-Jan-2010

07:57

x64

Fwpkclnt.sys

6.1.7600.16385

288,336

14-Jul-2009

01:47

x64

Tcpip.sys

6.1.7600.20628

1,901,568

27-Jan-2010

07:55

x64

For all supported IA-64-based versions of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Fwpkclnt.sys

6.1.7600.16385

482,896

14-Jul-2009

01:58

IA-64

Tcpip.sys

6.1.7600.16512

3,774,344

27-Jan-2010

06:16

IA-64

Fwpkclnt.sys

6.1.7600.16385

482,896

14-Jul-2009

01:58

IA-64

Tcpip.sys

6.1.7600.20628

3,780,096

27-Jan-2010

06:12

IA-64

Status

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

More Information

For more information about Windows Filtering Platform (WFP) and about WFP callout drivers, visit the following Microsoft Developer Network (MSDN) Web sites:

General information about Windows Filtering Platform (WFP)

Introduction to Windows Filtering Platform callout driversFor more information about the FwpsReleaseClassifyHandle0 function, visit the following MSDN Web site:

Parameter, return value and requirements of the FwpsReleaseClassifyHandle0 functionFor more information about software update terminology, 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

Additional file information

Additional file information for Windows 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7

File name

Update.mum

File version

Not applicable

File size

1,674

Date (UTC)

28-Jan-2010

Time (UTC)

19:12

Platform

Not applicable

File name

X86_0c8e4f8ea7b10c6246bad218cf62acb0_31bf3856ad364e35_6.1.7600.20628_none_f9326a31a096c901.manifest

File version

Not applicable

File size

702

Date (UTC)

28-Jan-2010

Time (UTC)

19:12

Platform

Not applicable

File name

X86_f7f0cf9468d7e4b42d0e8bdfcb39d70f_31bf3856ad364e35_6.1.7600.16512_none_e54464c33cc1e89e.manifest

File version

Not applicable

File size

702

Date (UTC)

28-Jan-2010

Time (UTC)

19:12

Platform

Not applicable

File name

X86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.16512_none_b33d1ad7c783c119.manifest

File version

Not applicable

File size

3,780

Date (UTC)

28-Jan-2010

Time (UTC)

19:14

Platform

Not applicable

File name

X86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.20628_none_b3c1e972e0a414de.manifest

File version

Not applicable

File size

3,780

Date (UTC)

28-Jan-2010

Time (UTC)

19:14

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

Amd64_390de2d435b465019bda5dccfc327efc_31bf3856ad364e35_6.1.7600.16512_none_3a76fb301cdf1d7b.manifest

File version

Not applicable

File size

706

Date (UTC)

28-Jan-2010

Time (UTC)

19:12

Platform

Not applicable

File name

Amd64_581cea0930f70efb1a58db604d06de66_31bf3856ad364e35_6.1.7600.20628_none_04e71716208179cc.manifest

File version

Not applicable

File size

706

Date (UTC)

28-Jan-2010

Time (UTC)

19:12

Platform

Not applicable

File name

Amd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.16512_none_0f5bb65b7fe1324f.manifest

File version

Not applicable

File size

3,784

Date (UTC)

28-Jan-2010

Time (UTC)

19:18

Platform

Not applicable

File name

Amd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.20628_none_0fe084f699018614.manifest

File version

Not applicable

File size

3,784

Date (UTC)

28-Jan-2010

Time (UTC)

19:18

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

1,906

Date (UTC)

28-Jan-2010

Time (UTC)

19:12

Platform

Not applicable

Additional files for all supported IA-64-based versions of Windows Server 2008 R2

File name

Ia64_9dd3832faf252545955abe3e97395669_31bf3856ad364e35_6.1.7600.16512_none_b8755b45c2f550a8.manifest

File version

Not applicable

File size

704

Date (UTC)

28-Jan-2010

Time (UTC)

19:12

Platform

Not applicable

File name

Ia64_b2f5ec7d1dde403f52431d4414c4cae6_31bf3856ad364e35_6.1.7600.20628_none_dfd604ee92e03a88.manifest

File version

Not applicable

File size

704

Date (UTC)

28-Jan-2010

Time (UTC)

19:12

Platform

Not applicable

File name

Ia64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.16512_none_b33ebecdc781ca15.manifest

File version

Not applicable

File size

3,782

Date (UTC)

28-Jan-2010

Time (UTC)

19:12

Platform

Not applicable

File name

Ia64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.20628_none_b3c38d68e0a21dda.manifest

File version

Not applicable

File size

3,782

Date (UTC)

28-Jan-2010

Time (UTC)

19:12

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

1,684

Date (UTC)

28-Jan-2010

Time (UTC)

19:12

Platform

Not applicable

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