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Symptoms

Consider the following scenario:

  • You install the Terminal Services role on a computer that is running Windows Server 2008 or Windows Server 2008 R2.

  • You join the terminal server to a domain.

  • Some Group Policy preference settings are configured in the domain and will be applied to the Terminal server.

  • Multiple users create Terminal Services sessions with the terminal server at the same time.

In this scenario, the Group Policy Client service crashes on the terminal server. When this occurs, users cannot log on to the terminal server.

Cause

This issue occurs because of a thread synchronization issue in the Group Policy Client service. Specifically, this issue is triggered when multiple threads try to access a static object at the same time.

Resolution

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. 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 website:

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

To apply this hotfix, your computer must be running Windows Server 2008 Service Pack 2 (SP2) or Windows Server 2008 R2 Service Pack 1 (SP1).

For more information about how to obtain a Windows Server 2008 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

968849 How to obtain the latest service pack for Windows Server 2008

For more information about how to obtain a Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2

Registry information

To use the hotfix 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 hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

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 Server 2008 file information notes

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

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

    Version

    Product

    SR_Level

    Service branch

    6.0.600
    2.
    22xxx

    Windows Server 2008

    SP2

    LDR

  • 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 and for Windows Vista" section. MUM files 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 Server 2008

File name

File version

File size

Date

Time

Platform

Gpprefcl.dll

6.0.6002.22746

647,680

24-Nov-2011

15:33

x86

For all supported x64-based versions of Windows Server 2008

File name

File version

File size

Date

Time

Platform

Gpprefcl.dll

6.0.6002.22746

846,848

24-Nov-2011

15:25

x64

Gpprefcl.dll

6.0.6002.22746

647,680

24-Nov-2011

15:33

x86

Windows Server 2008 R2 file information notes


Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix 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 hotfix 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
    1.21xxx

    Windows Server 2008 R2

    SP1

    LDR

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

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

File name

File version

File size

Date

Time

Platform

Gpprefcl.dll

6.1.7601.21864

788,480

22-Nov-2011

06:24

x64

Gpprefcl.dll

6.1.7601.21864

588,800

22-Nov-2011

05:25

x86

Gpprefcl.dll

6.1.7601.21864

588,800

22-Nov-2011

05:25

x86

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 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 Server 2008

Additional files for all supported x86-based versions of Windows Server 2008

File name

Update.mum

File version

Not applicable

File size

2,241

Date (UTC)

24-Nov-2011

Time (UTC)

18:25

Platform

Not applicable

File name

X86_b6e5085ebcde2779aa2dcc618461b849_31bf3856ad364e35_6.0.6002.22746_none_032bff16b4fe65c4.manifest

File version

Not applicable

File size

711

Date (UTC)

24-Nov-2011

Time (UTC)

18:25

Platform

Not applicable

File name

X86_microsoft-windows-g..ppolicy-policymaker_31bf3856ad364e35_6.0.6002.22746_none_399416c85f5ad6fd.manifest

File version

Not applicable

File size

106,474

Date (UTC)

24-Nov-2011

Time (UTC)

15:55

Platform

Not applicable

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

File name

Amd64_43262b45eb4d433d1d09ac91c7090a09_31bf3856ad364e35_6.0.6002.22746_none_9020220b9588f7a8.manifest

File version

Not applicable

File size

1,072

Date (UTC)

24-Nov-2011

Time (UTC)

18:25

Platform

Not applicable

File name

Amd64_microsoft-windows-g..ppolicy-policymaker_31bf3856ad364e35_6.0.6002.22746_none_95b2b24c17b84833.manifest

File version

Not applicable

File size

106,510

Date (UTC)

24-Nov-2011

Time (UTC)

15:46

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

2,257

Date (UTC)

24-Nov-2011

Time (UTC)

18:25

Platform

Not applicable

File name

Wow64_microsoft-windows-g..ppolicy-policymaker_31bf3856ad364e35_6.0.6002.22746_none_a0075c9e4c190a2e.manifest

File version

Not applicable

File size

66,987

Date (UTC)

24-Nov-2011

Time (UTC)

15:42

Platform

Not applicable

Additional file information for Windows Server 2008 R2

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

File name

Amd64_0f51d537a34ebe2a9d84d9313faee93f_31bf3856ad364e35_6.1.7601.21864_none_35155724f6a80bef.manifest

File version

Not applicable

File size

713

Date (UTC)

22-Nov-2011

Time (UTC)

16:33

Platform

Not applicable

File name

Amd64_67faa635c567c585769ea82ab8b5c288_31bf3856ad364e35_6.1.7601.21864_none_ac83b653796334d1.manifest

File version

Not applicable

File size

715

Date (UTC)

22-Nov-2011

Time (UTC)

16:33

Platform

Not applicable

File name

Amd64_6b4fd24c4eb4209eee1b36cb466e39c2_31bf3856ad364e35_6.1.7601.21864_none_37b5290cc845fe0c.manifest

File version

Not applicable

File size

1,070

Date (UTC)

22-Nov-2011

Time (UTC)

16:33

Platform

Not applicable

File name

Amd64_ba6078b9b5342b3d5ed9da9d87c7a564_31bf3856ad364e35_6.1.7601.21864_none_adbfa86186278a1f.manifest

File version

Not applicable

File size

715

Date (UTC)

22-Nov-2011

Time (UTC)

16:33

Platform

Not applicable

File name

Amd64_microsoft-windows-g..ppolicy-policymaker_31bf3856ad364e35_6.1.7601.21864_none_95c2cb5d78e1a3f0.manifest

File version

Not applicable

File size

53,972

Date (UTC)

22-Nov-2011

Time (UTC)

06:57

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

2,290

Date (UTC)

22-Nov-2011

Time (UTC)

16:33

Platform

Not applicable

File name

Wow64_microsoft-windows-g..ppolicy-policymaker_31bf3856ad364e35_6.1.7601.21864_none_a01775afad4265eb.manifest

File version

Not applicable

File size

34,836

Date (UTC)

22-Nov-2011

Time (UTC)

06:00

Platform

Not applicable

File name

X86_microsoft-windows-g..ppolicy-policymaker_31bf3856ad364e35_6.1.7601.21864_none_39a42fd9c08432ba.manifest

File version

Not applicable

File size

53,968

Date (UTC)

22-Nov-2011

Time (UTC)

06:11

Platform

Not applicable

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