Symptoms

Consider the following scenario:

  • You have a server that is running Windows Server 2008 R2 Service Pack 1.

  • You start a Remote Desktop session from a client computer to the server.

  • Then, you access a remote shared folder by using the Server Message Block (SMB) version 2 protocol from the Remote Desktop session.


In this scenario, if the network between the server and the remote share is not stable, the Remote Desktop session may randomly stop responding.

Note This problem may also randomly occur when you access a file share by using SMB version 2 over a high latency network.

Cause

This problem occurs because the SMB version 2 disconnect is handled incorrectly.

Resolution

Hotfix information

A supported hotfix is available from Microsoft Support. 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, go to 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 have Service Pack 1 for Windows 7 or Windows Server 2008 R2 installed.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any previously released hotfix.

The English (United States) 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 and 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

    SR_Level

    Service branch

    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, extremely important 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 Windows Server 2008 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain 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

Mrxsmb20.sys

6.1.7601.22558

97,280

04-Jan-2014

00:57

x86

Mrxsmb.sys

6.1.7601.22558

123,904

04-Jan-2014

00:57

x86

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

File name

File version

File size

Date

Time

Platform

Mrxsmb20.sys

6.1.7601.22558

128,000

04-Jan-2014

01:11

x64

Mrxsmb.sys

6.1.7601.22558

158,720

04-Jan-2014

01:12

x64

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

File name

File version

File size

Date

Time

Platform

Mrxsmb20.sys

6.1.7601.22558

311,296

04-Jan-2014

00:41

IA-64

Mrxsmb.sys

6.1.7601.22558

368,640

04-Jan-2014

00:41

IA-64

Additional file information

Additional file information for Windows 7 and Windows Server 2008 R2

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

File name

X86_a522980c8399f6bd557eaa91ac45e34f_31bf3856ad364e35_6.1.7601.22558_none_33572c7450a869ee.manifest

File version

Not applicable

File size

1,043

Date (UTC)

04-Jan-2014

Time (UTC)

06:06

Platform

Not applicable

File name

X86_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7601.22558_none_8d44a51c01428b65.manifest

File version

Not applicable

File size

4,035

Date (UTC)

04-Jan-2014

Time (UTC)

02:35

Platform

Not applicable

File name

X86_microsoft-windows-smbminirdr_31bf3856ad364e35_6.1.7601.22558_none_81fb1cb5c89a1992.manifest

File version

Not applicable

File size

4,757

Date (UTC)

04-Jan-2014

Time (UTC)

02:32

Platform

Not applicable

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

File name

Amd64_4245517372d1b3be95e16cfd089acd9a_31bf3856ad364e35_6.1.7601.22558_none_8bb8dc9474f89511.manifest

File version

Not applicable

File size

1,049

Date (UTC)

04-Jan-2014

Time (UTC)

06:06

Platform

Not applicable

File name

Amd64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7601.22558_none_e963409fb99ffc9b.manifest

File version

Not applicable

File size

4,039

Date (UTC)

04-Jan-2014

Time (UTC)

03:09

Platform

Not applicable

File name

Amd64_microsoft-windows-smbminirdr_31bf3856ad364e35_6.1.7601.22558_none_de19b83980f78ac8.manifest

File version

Not applicable

File size

4,761

Date (UTC)

04-Jan-2014

Time (UTC)

03:06

Platform

Not applicable

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

File name

Ia64_b222bf963d3c8161699205a745471cda_31bf3856ad364e35_6.1.7601.22558_none_94a243df4c1bd034.manifest

File version

Not applicable

File size

1,046

Date (UTC)

04-Jan-2014

Time (UTC)

06:06

Platform

Not applicable

File name

Ia64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7601.22558_none_8d46491201409461.manifest

File version

Not applicable

File size

4,037

Date (UTC)

04-Jan-2014

Time (UTC)

02:22

Platform

Not applicable

File name

Ia64_microsoft-windows-smbminirdr_31bf3856ad364e35_6.1.7601.22558_none_81fcc0abc898228e.manifest

File version

Not applicable

File size

4,759

Date (UTC)

04-Jan-2014

Time (UTC)

02:18

Platform

Not applicable


Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

References

Learn about the terminology that Microsoft uses to describe software updates.

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