Symptoms

Assume that you use Windows Management Instrumentation (WMI) performance classes to monitor performance on a computer that is running Windows 7 or Windows Server 2008 R2. In this situation, the WMI service and the WMI providers stop responding intermittently. Therefore, all the performance monitors stop.

Note You receive no alert or notification when this issue occurs.

Cause

This issue occurs because of a race condition in Wmiperfclass.dll.

Resolution

Hotfix information

A supported hotfix is 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 the problem that is 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 exist, 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, you must be running one of the following operating systems:

  • Windows 7

  • Windows 7 with Service Pack 1 (SP1)

  • Windows Server 2008 R2

  • Windows Server with 2008 R2 Service Pack 1 (SP1)

For more information about how to obtain a Windows 7 service pack or 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 do not have to 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 7 and 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 to which each hotfix applies.

  • 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

    6.1.760
    0.
    20xxx

    Windows 7 and Windows Server 2008 R2

    RTM

    LDR

    6.1.760
    1.
    21xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    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 R2 and for Windows 7" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are very important to maintaining 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 x86-based versions of Windows 7

File name

File version

File size

Date

Time

Platform

Wmiperfclass.dll

6.1.7600.20970

90,112

20-May-2011

12:12

x86

Wmiperfclass.mof

Not applicable

980

10-Jun-2009

21:31

Not applicable

Wmiperfinst.mof

Not applicable

804

10-Jun-2009

21:31

Not applicable

Wmiperfclass.dll

6.1.7601.21731

90,112

20-May-2011

15:27

x86

Wmiperfclass.mof

Not applicable

980

10-Jun-2009

21:31

Not applicable

Wmiperfinst.mof

Not applicable

804

10-Jun-2009

21:31

Not applicable

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

File name

File version

File size

Date

Time

Platform

Wmiperfclass.dll

6.1.7600.20970

136,192

20-May-2011

12:51

x64

Wmiperfclass.mof

Not applicable

980

10-Jun-2009

20:49

Not applicable

Wmiperfinst.mof

Not applicable

804

10-Jun-2009

20:49

Not applicable

Wmiperfclass.dll

6.1.7601.21731

136,192

20-May-2011

15:32

x64

Wmiperfclass.mof

Not applicable

980

10-Jun-2009

20:49

Not applicable

Wmiperfinst.mof

Not applicable

804

10-Jun-2009

20:49

Not applicable

Wmiperfclass.dll

6.1.7600.20970

90,112

20-May-2011

12:12

x86

Wmiperfclass.mof

Not applicable

980

10-Jun-2009

21:31

Not applicable

Wmiperfinst.mof

Not applicable

804

10-Jun-2009

21:31

Not applicable

Wmiperfclass.dll

6.1.7601.21731

90,112

20-May-2011

15:27

x86

Wmiperfclass.mof

Not applicable

980

10-Jun-2009

21:31

Not applicable

Wmiperfinst.mof

Not applicable

804

10-Jun-2009

21:31

Not applicable

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

File name

File version

File size

Date

Time

Platform

Wmiperfclass.dll

6.1.7600.20970

308,736

20-May-2011

11:45

IA-64

Wmiperfclass.mof

Not applicable

980

10-Jun-2009

20:54

Not applicable

Wmiperfinst.mof

Not applicable

804

10-Jun-2009

20:54

Not applicable

Wmiperfclass.dll

6.1.7601.21731

308,736

20-May-2011

15:17

IA-64

Wmiperfclass.mof

Not applicable

980

10-Jun-2009

20:54

Not applicable

Wmiperfinst.mof

Not applicable

804

10-Jun-2009

20:54

Not applicable

Wmiperfclass.dll

6.1.7600.20970

90,112

20-May-2011

12:12

x86

Wmiperfclass.mof

Not applicable

980

10-Jun-2009

21:31

Not applicable

Wmiperfinst.mof

Not applicable

804

10-Jun-2009

21:31

Not applicable

Wmiperfclass.dll

6.1.7601.21731

90,112

20-May-2011

15:27

x86

Wmiperfclass.mof

Not applicable

980

10-Jun-2009

21:31

Not applicable

Wmiperfinst.mof

Not applicable

804

10-Jun-2009

21:31

Not applicable

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

For more information about how to access WMI performance classes, click the following Microsoft Developer Network (MSDN) website:

Accessing WMI Preinstalled Performance Classes

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

X86_3350a3609f57c98e5a30ee3b8691a5d9_31bf3856ad364e35_6.1.7601.21731_none_05a95fb74fe0ac02.manifest

File version

Not applicable

File size

695

Date (UTC)

20-May-2011

Time (UTC)

23:57

Platform

Not applicable

File name

X86_7cb6528c49e03edc621de44fde190a3d_31bf3856ad364e35_6.1.7600.20970_none_1e2fd48435ce5989.manifest

File version

Not applicable

File size

695

Date (UTC)

20-May-2011

Time (UTC)

23:57

Platform

Not applicable

File name

X86_microsoft-windows-wmiperf_31bf3856ad364e35_6.1.7600.20970_none_9fffdf0f2cc5622a.manifest

File version

Not applicable

File size

7,521

Date (UTC)

21-May-2011

Time (UTC)

00:01

Platform

Not applicable

File name

X86_microsoft-windows-wmiperf_31bf3856ad364e35_6.1.7601.21731_none_a2127c0f29ca77a9.manifest

File version

Not applicable

File size

7,521

Date (UTC)

21-May-2011

Time (UTC)

00:01

Platform

Not applicable

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

File name

Amd64_3350a3609f57c98e5a30ee3b8691a5d9_31bf3856ad364e35_6.1.7601.21731_none_61c7fb3b083e1d38.manifest

File version

Not applicable

File size

697

Date (UTC)

20-May-2011

Time (UTC)

23:57

Platform

Not applicable

File name

Amd64_7cb6528c49e03edc621de44fde190a3d_31bf3856ad364e35_6.1.7600.20970_none_7a4e7007ee2bcabf.manifest

File version

Not applicable

File size

697

Date (UTC)

20-May-2011

Time (UTC)

23:57

Platform

Not applicable

File name

Amd64_812d95cb9b7ec9540a138c23c2d93e5e_31bf3856ad364e35_6.1.7600.20970_none_c260d2b2fb768e20.manifest

File version

Not applicable

File size

1,038

Date (UTC)

20-May-2011

Time (UTC)

23:57

Platform

Not applicable

File name

Amd64_980e91eabe88790e5c0682b10ec85dee_31bf3856ad364e35_6.1.7601.21731_none_13bc99a3b3ed4368.manifest

File version

Not applicable

File size

1,038

Date (UTC)

20-May-2011

Time (UTC)

23:57

Platform

Not applicable

File name

Amd64_a8a6157a9b7e1a234e8e7dac49cfa3d5_31bf3856ad364e35_6.1.7600.20970_none_981acce30c7905cb.manifest

File version

Not applicable

File size

699

Date (UTC)

20-May-2011

Time (UTC)

23:57

Platform

Not applicable

File name

Amd64_c8cbdc95c91b4a390e3c4de0962a2fa3_31bf3856ad364e35_6.1.7601.21731_none_d152e42fe0299b9d.manifest

File version

Not applicable

File size

699

Date (UTC)

20-May-2011

Time (UTC)

23:57

Platform

Not applicable

File name

Amd64_microsoft-windows-wmiperf_31bf3856ad364e35_6.1.7600.20970_none_fc1e7a92e522d360.manifest

File version

Not applicable

File size

7,525

Date (UTC)

21-May-2011

Time (UTC)

00:05

Platform

Not applicable

File name

Amd64_microsoft-windows-wmiperf_31bf3856ad364e35_6.1.7601.21731_none_fe311792e227e8df.manifest

File version

Not applicable

File size

7,525

Date (UTC)

21-May-2011

Time (UTC)

00:05

Platform

Not applicable

File name

X86_microsoft-windows-wmiperf_31bf3856ad364e35_6.1.7600.20970_none_9fffdf0f2cc5622a.manifest

File version

Not applicable

File size

7,521

Date (UTC)

21-May-2011

Time (UTC)

00:05

Platform

Not applicable

File name

X86_microsoft-windows-wmiperf_31bf3856ad364e35_6.1.7601.21731_none_a2127c0f29ca77a9.manifest

File version

Not applicable

File size

7,521

Date (UTC)

21-May-2011

Time (UTC)

00:05

Platform

Not applicable

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

File name

Ia64_3350a3609f57c98e5a30ee3b8691a5d9_31bf3856ad364e35_6.1.7601.21731_none_05ab03ad4fdeb4fe.manifest

File version

Not applicable

File size

696

Date (UTC)

20-May-2011

Time (UTC)

23:57

Platform

Not applicable

File name

Ia64_45f552553eb198df2db2d4913269d6aa_31bf3856ad364e35_6.1.7601.21731_none_e759b313301dceab.manifest

File version

Not applicable

File size

697

Date (UTC)

20-May-2011

Time (UTC)

23:57

Platform

Not applicable

File name

Ia64_7cb6528c49e03edc621de44fde190a3d_31bf3856ad364e35_6.1.7600.20970_none_1e31787a35cc6285.manifest

File version

Not applicable

File size

696

Date (UTC)

20-May-2011

Time (UTC)

23:57

Platform

Not applicable

File name

Ia64_e85397bcc7b20deabd76bc5f0f6d3b99_31bf3856ad364e35_6.1.7600.20970_none_d6a90a6e82da1e4f.manifest

File version

Not applicable

File size

697

Date (UTC)

20-May-2011

Time (UTC)

23:57

Platform

Not applicable

File name

Ia64_microsoft-windows-wmiperf_31bf3856ad364e35_6.1.7600.20970_none_a00183052cc36b26.manifest

File version

Not applicable

File size

7,523

Date (UTC)

20-May-2011

Time (UTC)

23:57

Platform

Not applicable

File name

Ia64_microsoft-windows-wmiperf_31bf3856ad364e35_6.1.7601.21731_none_a214200529c880a5.manifest

File version

Not applicable

File size

7,523

Date (UTC)

20-May-2011

Time (UTC)

23:57

Platform

Not applicable

File name

X86_microsoft-windows-wmiperf_31bf3856ad364e35_6.1.7600.20970_none_9fffdf0f2cc5622a.manifest

File version

Not applicable

File size

7,521

Date (UTC)

20-May-2011

Time (UTC)

23:57

Platform

Not applicable

File name

X86_microsoft-windows-wmiperf_31bf3856ad364e35_6.1.7601.21731_none_a2127c0f29ca77a9.manifest

File version

Not applicable

File size

7,521

Date (UTC)

20-May-2011

Time (UTC)

23:57

Platform

Not applicable

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