Not sure if this is the right fix? We've added this issue to our memory dump diagnostic which can confirm.

Symptoms

Consider the following scenario:

  • You connect to the Internet through a mobile broadband connection on a computer that is running Windows 7.

  • You enable the Always connect automatically option for the connection.

  • You resume the computer from S3 sleep.

In this scenario, the WWAN (wireless wide-area network) service may crash. Therefore, the mobile broadband connection cannot be reconnected. 

Note You have to restart the computer to recover from this issue.

Cause

This issue occurs because of a deadlock situation in the Windows Mobile Broadband Service (WWANSvc).

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 Windows 7 or Windows 7 Service Pack 1 (SP1).

For more information about how to obtain a Windows 7 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 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 file information notes


  • 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

    RTM

    GDR

    6.1.760
    0.20xxx

    Windows 7

    RTM

    LDR

    6.1.760
    1.17xxx

    Windows 7

    SP1

    GDR

    6.1.760
    1.21xxx

    Windows 7

    SP1

    LDR

  • GDR service branches contain only those fixes that are widely released to address widespread, very mportant 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" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are very important for 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

Wwanprotdim.dll

8.1.7600.16785

40,960

22-Mar-2011

04:41

x86

Wwansvc.dll

8.1.7600.16785

185,856

22-Mar-2011

04:41

x86

Wwan_profile_v1.xsd

Not applicable

6,201

10-Jun-2009

21:42

Not applicable

Wwanprotdim.dll

8.1.7600.20930

40,960

22-Mar-2011

04:45

x86

Wwansvc.dll

8.1.7600.20930

185,856

22-Mar-2011

04:45

x86

Wwan_profile_v1.xsd

Not applicable

6,201

10-Jun-2009

21:42

Not applicable

Wwanprotdim.dll

8.1.7601.17514

40,960

20-Nov-2010

12:21

x86

Wwansvc.dll

8.1.7601.17583

185,856

22-Mar-2011

04:38

x86

Wwan_profile_v1.xsd

Not applicable

6,201

10-Jun-2009

21:42

Not applicable

Wwanprotdim.dll

8.1.7601.17514

40,960

20-Nov-2010

12:21

x86

Wwansvc.dll

8.1.7601.21689

185,856

22-Mar-2011

04:27

x86

Wwan_profile_v1.xsd

Not applicable

6,201

10-Jun-2009

21:42

Not applicable

For all supported x64-based versions of Windows 7

File name

File version

File size

Date

Time

Platform

Wwanprotdim.dll

8.1.7600.16785

48,640

22-Mar-2011

05:22

x64

Wwansvc.dll

8.1.7600.16785

229,888

22-Mar-2011

05:22

x64

Wwan_profile_v1.xsd

Not applicable

6,201

10-Jun-2009

21:03

Not applicable

Wwanprotdim.dll

8.1.7600.20930

48,640

22-Mar-2011

05:25

x64

Wwansvc.dll

8.1.7600.20930

229,888

22-Mar-2011

05:25

x64

Wwan_profile_v1.xsd

Not applicable

6,201

10-Jun-2009

21:03

Not applicable

Wwanprotdim.dll

8.1.7601.17514

48,640

20-Nov-2010

13:27

x64

Wwansvc.dll

8.1.7601.17583

229,888

22-Mar-2011

05:25

x64

Wwan_profile_v1.xsd

Not applicable

6,201

10-Jun-2009

21:03

Not applicable

Wwanprotdim.dll

8.1.7601.17514

48,640

20-Nov-2010

13:27

x64

Wwansvc.dll

8.1.7601.21689

229,888

22-Mar-2011

05:16

x64

Wwan_profile_v1.xsd

Not applicable

6,201

10-Jun-2009

21:03

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 mobile broadband, visit the following Microsoft website:

General information about mobile broadbandFor more information about how to use mobile broadband, visit the following Microsoft website:

How to use mobile broadband to connect to the InternetFor 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

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

File name

Update.mum

File version

Not applicable

File size

2,285

Date (UTC)

22-Mar-2011

Time (UTC)

15:02

Platform

Not applicable

File name

X86_51a9f92988e2afcf4d7eaf64fb9da9c5_31bf3856ad364e35_6.1.7600.20930_none_8a6ed33bf0975d1a.manifest

File version

Not applicable

File size

695

Date (UTC)

22-Mar-2011

Time (UTC)

15:02

Platform

Not applicable

File name

X86_cb5cedcbf3a04bf1d7476465cf1c9fe5_31bf3856ad364e35_6.1.7601.21689_none_e6f3549a2a05a66f.manifest

File version

Not applicable

File size

695

Date (UTC)

22-Mar-2011

Time (UTC)

15:02

Platform

Not applicable

File name

X86_ccac5455603b9b09abefb121eacf2bdd_31bf3856ad364e35_6.1.7600.16785_none_be4b73f859be731b.manifest

File version

Not applicable

File size

695

Date (UTC)

22-Mar-2011

Time (UTC)

15:02

Platform

Not applicable

File name

X86_dcfa2d3b6b1480fa371ba85462796b3a_31bf3856ad364e35_6.1.7601.17583_none_12bf76bcf27cac4e.manifest

File version

Not applicable

File size

695

Date (UTC)

22-Mar-2011

Time (UTC)

15:02

Platform

Not applicable

File name

X86_microsoft-windows-wwansvc_31bf3856ad364e35_6.1.7600.16785_none_a144f4a7806a0c1a.manifest

File version

Not applicable

File size

49,377

Date (UTC)

22-Mar-2011

Time (UTC)

05:10

Platform

Not applicable

File name

X86_microsoft-windows-wwansvc_31bf3856ad364e35_6.1.7600.20930_none_a1ffa18299639ea3.manifest

File version

Not applicable

File size

49,377

Date (UTC)

22-Mar-2011

Time (UTC)

05:08

Platform

Not applicable

File name

X86_microsoft-windows-wwansvc_31bf3856ad364e35_6.1.7601.17583_none_a32951197d924558.manifest

File version

Not applicable

File size

51,347

Date (UTC)

22-Mar-2011

Time (UTC)

15:07

Platform

Not applicable

File name

X86_microsoft-windows-wwansvc_31bf3856ad364e35_6.1.7601.21689_none_a3b8efa096aa7d2c.manifest

File version

Not applicable

File size

51,347

Date (UTC)

22-Mar-2011

Time (UTC)

15:07

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 7

File name

Amd64_218df93ab037b8dbb787b8033724090b_31bf3856ad364e35_6.1.7600.16785_none_22d4c5270e775198.manifest

File version

Not applicable

File size

699

Date (UTC)

22-Mar-2011

Time (UTC)

15:02

Platform

Not applicable

File name

Amd64_73b80caf1490838b3e23be4ea392179c_31bf3856ad364e35_6.1.7601.17583_none_87e4ff80f874fadb.manifest

File version

Not applicable

File size

699

Date (UTC)

22-Mar-2011

Time (UTC)

15:02

Platform

Not applicable

File name

Amd64_9c1725a4fae27afe4bd70fe0b3fe9a00_31bf3856ad364e35_6.1.7600.20930_none_f0f0f2ac2cda8cee.manifest

File version

Not applicable

File size

699

Date (UTC)

22-Mar-2011

Time (UTC)

15:02

Platform

Not applicable

File name

Amd64_e11a4975c2c1f9cc4b104133150cb27d_31bf3856ad364e35_6.1.7601.21689_none_50f64abaf7a79173.manifest

File version

Not applicable

File size

699

Date (UTC)

22-Mar-2011

Time (UTC)

15:02

Platform

Not applicable

File name

Amd64_microsoft-windows-wwansvc_31bf3856ad364e35_6.1.7600.16785_none_fd63902b38c77d50.manifest

File version

Not applicable

File size

49,381

Date (UTC)

22-Mar-2011

Time (UTC)

06:10

Platform

Not applicable

File name

Amd64_microsoft-windows-wwansvc_31bf3856ad364e35_6.1.7600.20930_none_fe1e3d0651c10fd9.manifest

File version

Not applicable

File size

49,381

Date (UTC)

22-Mar-2011

Time (UTC)

06:12

Platform

Not applicable

File name

Amd64_microsoft-windows-wwansvc_31bf3856ad364e35_6.1.7601.17583_none_ff47ec9d35efb68e.manifest

File version

Not applicable

File size

51,351

Date (UTC)

22-Mar-2011

Time (UTC)

15:03

Platform

Not applicable

File name

Amd64_microsoft-windows-wwansvc_31bf3856ad364e35_6.1.7601.21689_none_ffd78b244f07ee62.manifest

File version

Not applicable

File size

51,351

Date (UTC)

22-Mar-2011

Time (UTC)

15:03

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

2,301

Date (UTC)

22-Mar-2011

Time (UTC)

15:02

Platform

Not applicable

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