Symptoms

Assume that you try to open a Microsoft Excel worksheet on a Web Distributed Authoring and Versioning (WebDAV) server on a computer that is running Windows 7 or Windows Server 2008 R2. Additionally, assume that you receive the Folder In Use dialog box because another user is using the worksheet. In this situation, the wrong user name is displayed in the Folder In Use dialog box.

For example, when you try to open the worksheet that another user (user A) is using, you receive a message that resembles the following:

File name is locked for editing by user name
In this situation, the user name that is displayed in the message is not user A.

Cause

This issue is caused by an error in the Mrxdav.sys component on the client computer. An exception is raised by the Mrxdav.sys component when the input buffer parameter is passed through the read/write I/O request packet (IRP). Therefore, the Win32API function cannot obtain the correct user information.

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:

976932Information 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, 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

    Milestone

    Service branch

    6.1.760
    0.21xxx

    Windows 7 and Windows Server 2008 R2

    RTM

    LDR

    6.1.760
    1.22xxx

    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 7 and for Windows Server 2008 R2" section. MUM 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 7

File name

File version

File size

Date

Time

Platform

Mrxdav.sys

6.1.7600.21259

117,248

06-Jul-2012

21:05

x86

Mrxdav.sys

6.1.7601.22046

116,224

06-Jul-2012

18:41

x86

Webclnt.dll

6.1.7600.21259

207,872

06-Jul-2012

23:15

x86

Webclnt.dll

6.1.7601.22046

207,872

06-Jul-2012

20:45

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

Mrxdav.sys

6.1.7600.21259

141,824

06-Jul-2012

19:15

x64

Mrxdav.sys

6.1.7601.22046

141,312

06-Jul-2012

19:02

x64

Webclnt.dll

6.1.7600.21259

263,168

06-Jul-2012

21:57

x64

Webclnt.dll

6.1.7601.22046

263,680

06-Jul-2012

21:43

x64

Mrxdav.sys

6.1.7600.21259

117,248

06-Jul-2012

21:05

x86

Mrxdav.sys

6.1.7601.22046

116,224

06-Jul-2012

18:41

x86

Webclnt.dll

6.1.7600.21259

207,872

06-Jul-2012

23:15

x86

Webclnt.dll

6.1.7601.22046

207,872

06-Jul-2012

20:45

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:

824684Description 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.mum

File version

Not Applicable

File size

2,482

Date (UTC)

17-Sep-2012

Time (UTC)

14:17

Platform

Not Applicable

File name

X86_6006b8f2e1369660370845165d480d08_31bf3856ad364e35_6.1.7601.22046_none_159f64346441e5d5.manifest

File version

Not Applicable

File size

1,059

Date (UTC)

17-Sep-2012

Time (UTC)

14:17

Platform

Not Applicable

File name

X86_c1d94c49f11b6e143546fb6f23138d1c_31bf3856ad364e35_6.1.7600.21259_none_37c1999834a41a9c.manifest

File version

Not Applicable

File size

1,059

Date (UTC)

17-Sep-2012

Time (UTC)

14:17

Platform

Not Applicable

File name

X86_microsoft-windows-webdavredir-mrxdav_31bf3856ad364e35_6.1.7600.21259_none_152f2e7e40110ab1.manifest

File version

Not Applicable

File size

12,632

Date (UTC)

06-Jul-2012

Time (UTC)

23:45

Platform

Not Applicable

File name

X86_microsoft-windows-webdavredir-mrxdav_31bf3856ad364e35_6.1.7601.22046_none_171d5a923d320ea7.manifest

File version

Not Applicable

File size

12,632

Date (UTC)

06-Jul-2012

Time (UTC)

21:11

Platform

Not Applicable

File name

X86_microsoft-windows-webdavredir-webclient_31bf3856ad364e35_6.1.7600.21259_none_55aa13032e070998.manifest

File version

Not Applicable

File size

2,413

Date (UTC)

06-Jul-2012

Time (UTC)

23:53

Platform

Not Applicable

File name

X86_microsoft-windows-webdavredir-webclient_31bf3856ad364e35_6.1.7601.22046_none_57983f172b280d8e.manifest

File version

Not Applicable

File size

2,413

Date (UTC)

06-Jul-2012

Time (UTC)

21:16

Platform

Not Applicable

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

File name

Amd64_3edbdc734b9063c6891ff81dbad3c2af_31bf3856ad364e35_6.1.7600.21259_none_f8fef13d3dd7b923.manifest

File version

Not Applicable

File size

710

Date (UTC)

17-Sep-2012

Time (UTC)

14:17

Platform

Not Applicable

File name

Amd64_4fbb4ca2a0733e9971e1b04632687d12_31bf3856ad364e35_6.1.7601.22046_none_de022d4179dbe12a.manifest

File version

Not Applicable

File size

710

Date (UTC)

17-Sep-2012

Time (UTC)

14:17

Platform

Not Applicable

File name

Amd64_56270fec3fb3ac43270cb8117d639a52_31bf3856ad364e35_6.1.7601.22046_none_f42a7d4334781642.manifest

File version

Not Applicable

File size

1,065

Date (UTC)

17-Sep-2012

Time (UTC)

14:17

Platform

Not Applicable

File name

Amd64_5e7916d26c61d6046636aa97ed570255_31bf3856ad364e35_6.1.7600.21259_none_33215cebdb42d4db.manifest

File version

Not Applicable

File size

1,065

Date (UTC)

17-Sep-2012

Time (UTC)

14:17

Platform

Not Applicable

File name

Amd64_6a896de6a3a1ad28fb2c90c8fea04b1c_31bf3856ad364e35_6.1.7600.21259_none_28a2cf326ee10ef3.manifest

File version

Not Applicable

File size

711

Date (UTC)

17-Sep-2012

Time (UTC)

14:17

Platform

Not Applicable

File name

Amd64_8bb80e3810dbf7b2c13522fc03dc28f1_31bf3856ad364e35_6.1.7601.22046_none_97604b2bf4e6c068.manifest

File version

Not Applicable

File size

711

Date (UTC)

17-Sep-2012

Time (UTC)

14:17

Platform

Not Applicable

File name

Amd64_b2730cf7886aa648b1183a1555d30246_31bf3856ad364e35_6.1.7600.21259_none_d2eb830a65518caf.manifest

File version

Not Applicable

File size

1,418

Date (UTC)

17-Sep-2012

Time (UTC)

14:17

Platform

Not Applicable

File name

Amd64_e2df9a3730aab5464cae23d6f8bd960f_31bf3856ad364e35_6.1.7601.22046_none_e22fb69df02f4e9a.manifest

File version

Not Applicable

File size

1,418

Date (UTC)

17-Sep-2012

Time (UTC)

14:17

Platform

Not Applicable

File name

Amd64_microsoft-windows-webdavredir-mrxdav_31bf3856ad364e35_6.1.7600.21259_none_714dca01f86e7be7.manifest

File version

Not Applicable

File size

12,634

Date (UTC)

07-Jul-2012

Time (UTC)

00:34

Platform

Not Applicable

File name

Amd64_microsoft-windows-webdavredir-mrxdav_31bf3856ad364e35_6.1.7601.22046_none_733bf615f58f7fdd.manifest

File version

Not Applicable

File size

12,634

Date (UTC)

06-Jul-2012

Time (UTC)

22:07

Platform

Not Applicable

File name

Amd64_microsoft-windows-webdavredir-webclient_31bf3856ad364e35_6.1.7600.21259_none_b1c8ae86e6647ace.manifest

File version

Not Applicable

File size

2,417

Date (UTC)

07-Jul-2012

Time (UTC)

00:40

Platform

Not Applicable

File name

Amd64_microsoft-windows-webdavredir-webclient_31bf3856ad364e35_6.1.7601.22046_none_b3b6da9ae3857ec4.manifest

File version

Not Applicable

File size

2,417

Date (UTC)

06-Jul-2012

Time (UTC)

22:12

Platform

Not Applicable

File name

Update.mum

File version

Not Applicable

File size

3,331

Date (UTC)

17-Sep-2012

Time (UTC)

14:17

Platform

Not Applicable

File name

Wow64_microsoft-windows-webdavredir-mrxdav_31bf3856ad364e35_6.1.7600.21259_none_7ba274542ccf3de2.manifest

File version

Not Applicable

File size

6,779

Date (UTC)

06-Jul-2012

Time (UTC)

23:42

Platform

Not Applicable

File name

Wow64_microsoft-windows-webdavredir-mrxdav_31bf3856ad364e35_6.1.7601.22046_none_7d90a06829f041d8.manifest

File version

Not Applicable

File size

6,779

Date (UTC)

06-Jul-2012

Time (UTC)

21:01

Platform

Not Applicable

File name

X86_microsoft-windows-webdavredir-webclient_31bf3856ad364e35_6.1.7600.21259_none_55aa13032e070998.manifest

File version

Not Applicable

File size

2,413

Date (UTC)

06-Jul-2012

Time (UTC)

23:53

Platform

Not Applicable

File name

X86_microsoft-windows-webdavredir-webclient_31bf3856ad364e35_6.1.7601.22046_none_57983f172b280d8e.manifest

File version

Not Applicable

File size

2,413

Date (UTC)

06-Jul-2012

Time (UTC)

21:16

Platform

Not Applicable

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