Symptoms

On a computer that is running Windows 7 Service Pack 1 (SP1) or Windows Server 2008 R2 SP1, the Windows Explorer process stops responding. Additionally, you receive the following error message:

0xc0000005

If you examine the call stack when this issue occurs, you notice that the issue is related to the NetworkItemFactory.dll component.

Cause

This issue occurs because of a race condition. When a thread tries to close the handle to an object that is being destroyed, the operation fails.

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 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, you must be running one of the following operating systems:

  • Windows 7 SP1

  • Windows Server 2008 R2 SP1

For more information about how to obtain a Windows 7 or 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 apply this hotfix, 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 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 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
    1.17xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    GDR

    6.1.760
    1.21xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    LDR

  • GDR service branches contain only those fixes that are widely released to address widespread, critical 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 7 and for Windows Server 2008 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical 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

Networkexplorer.dll

6.1.7601.17514

1,661,440

20-Nov-2010

12:20

Networkitemfactory.dll

6.1.7601.22010

41,472

02-Jun-2012

04:54

Networkitemfactory.mof

Not applicable

683

10-Jun-2009

21:21

Networkmap.dll

6.1.7601.22010

2,130,944

02-Jun-2012

04:54

Networkmap.mof

Not applicable

631

10-Jun-2009

21:21

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

File name

File version

File size

Date

Time

Networkexplorer.dll

6.1.7601.17514

1,672,704

20-Nov-2010

13:27

Networkitemfactory.dll

6.1.7601.22010

53,248

04-Jun-2012

07:54

Networkitemfactory.mof

Not applicable

683

10-Jun-2009

20:38

Networkmap.dll

6.1.7601.22010

2,146,816

20-Nov-2010

13:27

Networkmap.mof

Not applicable

631

10-Jun-2009

20:39

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

File name

File version

File size

Date

Time

Networkexplorer.dll

6.1.7601.22010

1,760,256

02-Jun-2012

04:19

Networkitemfactory.dll

6.1.7601.22010

134,656

02-Jun-2012

04:19

Networkitemfactory.mof

Not applicable

683

10-Jun-2009

20:42

Networkmap.dll

6.1.7601.22010

2,276,352

02-Jun-2012

04:19

Networkmap.mof

Not applicable

631

10-Jun-2009

20:43

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 7 and for Windows Server 2008 R2

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

File name

X86_4e180885bcd46a0e270e5fdea2a03e00_31bf3856ad364e35_6.1.7601.22010_none_780fc9c2df00ec59.manifest

File version

Not applicable

File size

703

Date (UTC)

05-Jun-2012

Time (UTC)

06:40

File name

X86_microsoft-windows-networkexplorer_31bf3856ad364e35_6.1.7601.22010_none_42df4474bd43d9c9.manifest

File version

Not applicable

File size

15,122

Date (UTC)

05-Jun-2012

Time (UTC)

06:54

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

File name

Amd64_1cbf06ef64ea17c5135898900f8e887f_31bf3856ad364e35_6.1.7601.22010_none_35d3603ca30f580d.manifest

File version

Not applicable

File size

707

Date (UTC)

05-Jun-2012

Time (UTC)

06:40

File name

Amd64_4e180885bcd46a0e270e5fdea2a03e00_31bf3856ad364e35_6.1.7601.22010_none_d42e6546975e5d8f.manifest

File version

Not applicable

File size

705

Date (UTC)

05-Jun-2012

Time (UTC)

06:40

File name

Amd64_4ff09b5741ead6883c10e247c2bda701_31bf3856ad364e35_6.1.7601.22010_none_b739865b61de4eb0.manifest

File version

Not applicable

File size

1,054

Date (UTC)

05-Jun-2012

Time (UTC)

06:40

File name

Amd64_microsoft-windows-networkexplorer_31bf3856ad364e35_6.1.7601.22010_none_9efddff875a14aff.manifest

File version

Not applicable

File size

15,126

Date (UTC)

05-Jun-2012

Time (UTC)

07:04

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

File name

Ia64_e6d3df8fb8c146c145b7db8356e42ebb_31bf3856ad364e35_6.1.7601.22010_none_1c73566728174181.manifest

File version

Not applicable

File size

1,052

Date (UTC)

05-Jun-2012

Time (UTC)

06:40

File name

Ia64_microsoft-windows-networkexplorer_31bf3856ad364e35_6.1.7601.22010_none_42e0e86abd41e2c5.manifest

File version

Not applicable

File size

14,796

Date (UTC)

02-Jun-2012

Time (UTC)

06:22

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