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Symptoms

Assume that you have a computer that is running Windows 7 or Windows Server 2008 R2 and that has a certain WLAN chipset installed. For example, the computer has a Qualcomm Atheros AR9285 WLAN chipset installed. You install the hotfix that is described in Microsoft Knowledge Base (KB) article 2624668 on the computer. In this situation, the WLAN chipset no longer detects any wireless network connections.

Resolution

Hotfix information

Important This hotfix has been re-released to address an issue in which the digital signature on files produced and signed by Microsoft will expire prematurely, as described in Microsoft Security Advisory 2749655.

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

  • Windows 7 Service Pack 1 (SP1)

  • Windows Server 2008 R2

  • Windows Server 2008 R2 Service Pack 1 (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
    0.17xxx

    Windows 7 and Windows Server 2008 R2

    RTM

    GDR

    6.1.760
    0.21xxx

    Windows 7 and Windows Server 2008 R2

    RTM

    LDR

    6.1.760
    1.17xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    GDR

    6.1.760
    1.22xxx

    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

Platform

Ndis.sys

6.1.7600.17126

710,512

14-Sep-2012

18:43

x86

Ndis.sys

6.1.7600.21326

711,024

14-Sep-2012

18:43

x86

Ndismigplugin.dll

6.1.7600.21326

156,160

14-Sep-2012

18:31

x86

Ndis.sys

6.1.7601.17956

712,072

19-Sep-2012

04:16

x86

Ndis.sys

6.1.7601.22114

712,048

19-Sep-2012

04:22

x86

Ndismigplugin.dll

6.1.7601.22114

156,160

19-Sep-2012

04:11

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

Ndis.sys

6.1.7600.17126

946,544

14-Sep-2012

19:35

x64

Ndis.sys

6.1.7600.21326

947,056

14-Sep-2012

19:37

x64

Ndismigplugin.dll

6.1.7600.21326

166,912

14-Sep-2012

19:29

x64

Ndis.sys

6.1.7601.17956

950,128

19-Sep-2012

05:04

x64

Ndis.sys

6.1.7601.22114

950,128

19-Sep-2012

06:01

x64

Ndismigplugin.dll

6.1.7601.22114

166,912

19-Sep-2012

05:50

x64

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

File name

File version

File size

Date

Time

Platform

Ndis.sys

6.1.7600.17126

1,997,168

14-Sep-2012

18:31

IA-64

Ndis.sys

6.1.7600.21326

1,997,680

14-Sep-2012

18:48

IA-64

Ndismigplugin.dll

6.1.7600.21326

357,376

14-Sep-2012

18:38

IA-64

Ndis.sys

6.1.7601.17956

1,998,192

19-Sep-2012

03:44

IA-64

Ndis.sys

6.1.7601.22114

1,998,216

19-Sep-2012

04:26

IA-64

Ndismigplugin.dll

6.1.7601.22114

357,376

19-Sep-2012

04:16

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 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-bf.mum

File version

Not Applicable

File size

2,719

Date (UTC)

20-Sep-2012

Time (UTC)

12:11

Platform

Not Applicable

File name

Update.mum

File version

Not Applicable

File size

2,773

Date (UTC)

20-Sep-2012

Time (UTC)

12:11

Platform

Not Applicable

File name

X86_2eb0485fe6d8c50bc1079868672a7850_31bf3856ad364e35_6.1.7601.17956_none_196378d2d11fdaf7.manifest

File version

Not Applicable

File size

692

Date (UTC)

20-Sep-2012

Time (UTC)

12:11

Platform

Not Applicable

File name

X86_71b871af087b7aa5c231e47ec5edbe84_31bf3856ad364e35_6.1.7600.21326_none_181dcdcdab02eb69.manifest

File version

Not Applicable

File size

692

Date (UTC)

20-Sep-2012

Time (UTC)

12:11

Platform

Not Applicable

File name

X86_cf890e997d35449e6cd84624d24ff59d_31bf3856ad364e35_6.1.7601.22114_none_fbb37ccbfbff6449.manifest

File version

Not Applicable

File size

692

Date (UTC)

20-Sep-2012

Time (UTC)

12:11

Platform

Not Applicable

File name

X86_d0f729c64b82773c739d02dcba0f6a5b_31bf3856ad364e35_6.1.7600.17126_none_7f9e1d080af51672.manifest

File version

Not Applicable

File size

692

Date (UTC)

20-Sep-2012

Time (UTC)

12:11

Platform

Not Applicable

File name

X86_microsoft-windows-ndis_31bf3856ad364e35_6.1.7600.17126_none_a7df47287d31338d.manifest

File version

Not Applicable

File size

225,943

Date (UTC)

20-Sep-2012

Time (UTC)

12:25

Platform

Not Applicable

File name

X86_microsoft-windows-ndis_31bf3856ad364e35_6.1.7600.21326_none_a868e5d9964ed07e.manifest

File version

Not Applicable

File size

218,613

Date (UTC)

14-Sep-2012

Time (UTC)

19:09

Platform

Not Applicable

File name

X86_microsoft-windows-ndis_31bf3856ad364e35_6.1.7601.17956_none_a9a55e2e7a6fbd31.manifest

File version

Not Applicable

File size

225,943

Date (UTC)

20-Sep-2012

Time (UTC)

12:25

Platform

Not Applicable

File name

X86_microsoft-windows-ndis_31bf3856ad364e35_6.1.7601.22114_none_aa581237936eedcb.manifest

File version

Not Applicable

File size

218,613

Date (UTC)

19-Sep-2012

Time (UTC)

04:42

Platform

Not Applicable

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

File name

Amd64_3bef5efe1a40dc5a59d18d30f17405f3_31bf3856ad364e35_6.1.7601.17956_none_a2c2ac0129f41e3a.manifest

File version

Not Applicable

File size

696

Date (UTC)

20-Sep-2012

Time (UTC)

12:11

Platform

Not Applicable

File name

Amd64_4446613d340ac5328298446f6152c2d0_31bf3856ad364e35_6.1.7601.22114_none_b082039ec143017f.manifest

File version

Not Applicable

File size

696

Date (UTC)

20-Sep-2012

Time (UTC)

12:11

Platform

Not Applicable

File name

Amd64_48e0093bce32a28ff1e24e60d1740b4e_31bf3856ad364e35_6.1.7600.17126_none_4a3a49c154e9f6e1.manifest

File version

Not Applicable

File size

696

Date (UTC)

20-Sep-2012

Time (UTC)

12:11

Platform

Not Applicable

File name

Amd64_f135193fde2b9bff631cd799ecd4d274_31bf3856ad364e35_6.1.7600.21326_none_2390cc2252fd120e.manifest

File version

Not Applicable

File size

696

Date (UTC)

20-Sep-2012

Time (UTC)

12:11

Platform

Not Applicable

File name

Amd64_microsoft-windows-ndis_31bf3856ad364e35_6.1.7600.17126_none_03fde2ac358ea4c3.manifest

File version

Not Applicable

File size

225,991

Date (UTC)

20-Sep-2012

Time (UTC)

12:40

Platform

Not Applicable

File name

Amd64_microsoft-windows-ndis_31bf3856ad364e35_6.1.7600.21326_none_0487815d4eac41b4.manifest

File version

Not Applicable

File size

218,661

Date (UTC)

14-Sep-2012

Time (UTC)

20:41

Platform

Not Applicable

File name

Amd64_microsoft-windows-ndis_31bf3856ad364e35_6.1.7601.17956_none_05c3f9b232cd2e67.manifest

File version

Not Applicable

File size

225,991

Date (UTC)

20-Sep-2012

Time (UTC)

12:40

Platform

Not Applicable

File name

Amd64_microsoft-windows-ndis_31bf3856ad364e35_6.1.7601.22114_none_0676adbb4bcc5f01.manifest

File version

Not Applicable

File size

218,661

Date (UTC)

19-Sep-2012

Time (UTC)

06:23

Platform

Not Applicable

File name

Update-bf.mum

File version

Not Applicable

File size

3,153

Date (UTC)

20-Sep-2012

Time (UTC)

12:11

Platform

Not Applicable

File name

Update.mum

File version

Not Applicable

File size

3,215

Date (UTC)

20-Sep-2012

Time (UTC)

12:11

Platform

Not Applicable

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

T

File name

Ia64_0e215be5e059641d5685fcc1b1f3ffba_31bf3856ad364e35_6.1.7600.21326_none_40a2d239c9edf210.manifest

File version

Not Applicable

File size

694

Date (UTC)

20-Sep-2012

Time (UTC)

12:11

Platform

Not Applicable

File name

Ia64_3e2bc70c3fbcd2948358d8914260a9e8_31bf3856ad364e35_6.1.7601.17956_none_9e5b45527775095b.manifest

File version

Not Applicable

File size

694

Date (UTC)

20-Sep-2012

Time (UTC)

12:11

Platform

Not Applicable

File name

Ia64_4117366e219f03ce1d0d929d5379cbe0_31bf3856ad364e35_6.1.7601.22114_none_63ddaef3f21ec361.manifest

File version

Not Applicable

File size

694

Date (UTC)

20-Sep-2012

Time (UTC)

12:11

Platform

Not Applicable

File name

Ia64_8efc828996143bd6de43f2d323385ac3_31bf3856ad364e35_6.1.7600.17126_none_0ec6ca799d6db5df.manifest

File version

Not Applicable

File size

694

Date (UTC)

20-Sep-2012

Time (UTC)

12:11

Platform

Not Applicable

File name

Ia64_microsoft-windows-ndis_31bf3856ad364e35_6.1.7600.17126_none_a7e0eb1e7d2f3c89.manifest

File version

Not Applicable

File size

225,960

Date (UTC)

20-Sep-2012

Time (UTC)

12:11

Platform

Not Applicable

File name

Ia64_microsoft-windows-ndis_31bf3856ad364e35_6.1.7600.21326_none_a86a89cf964cd97a.manifest

File version

Not Applicable

File size

218,630

Date (UTC)

14-Sep-2012

Time (UTC)

20:35

Platform

Not Applicable

File name

Ia64_microsoft-windows-ndis_31bf3856ad364e35_6.1.7601.17956_none_a9a702247a6dc62d.manifest

File version

Not Applicable

File size

225,960

Date (UTC)

20-Sep-2012

Time (UTC)

12:11

Platform

Not Applicable

File name

Ia64_microsoft-windows-ndis_31bf3856ad364e35_6.1.7601.22114_none_aa59b62d936cf6c7.manifest

File version

Not Applicable

File size

218,630

Date (UTC)

19-Sep-2012

Time (UTC)

05:32

Platform

Not Applicable

File name

Update-bf.mum

File version

Not Applicable

File size

1,909

Date (UTC)

20-Sep-2012

Time (UTC)

12:11

Platform

Not Applicable

File name

Update.mum

File version

Not Applicable

File size

1,947

Date (UTC)

20-Sep-2012

Time (UTC)

12:11

Platform

Not Applicable

he third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

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