You cannot access shared files or shared printers in Windows 7 or in Windows Server 2008 R2

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# You cannot access shared files or shared printers in Windows 7 or in Windows Server 2008 R2

Article ID: 2444328 - View products that this article applies to.
Hotfix Download Available
System TipThis article applies to a different version of Windows than the one you are using. Content in this article may not be relevant to you. Visit the Windows 8 Solution Center
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## On This Page

- SYMPTOMS
- CAUSE
- RESOLUTION
  - Hotfix information
    - Prerequisites
    - Registry information
    - Restart requirement
    - Hotfix replacement information
    - File information
      - Windows 7 and Windows Server 2008 R2 file information notes
      - For all supported x86-based versions of Windows 7
      - For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
      - For all supported IA-64-based versions of Windows Server 2008 R2
- WORKAROUND
  - Workaround for Windows 7 and for Windows Server 2008 R2
- STATUS
- MORE INFORMATION
  - 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
      - Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
      - Additional files for all supported IA-64-based versions of Windows Server 2008 R2
- Properties
- Give Feedback

## SYMPTOMS

Consider the following scenario:

- A computer is running Windows 7 or Windows Server 2008 R2.
- The computer is running under a heavy load.
- You try to access shared files or shared printers from the computer by using the Server Message Block (SMB) v1 protocol.

In this scenario, you cannot access shared files or shared printers. Additionally, you receive an error message that resembles the following:
Specified network name is no longer available.
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## CAUSE

This issue occurs because of a race condition in the Mrxsmb10.sys driver.
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## 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=support
(http://support.microsoft.com/contactus/?ws=support)
Note 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)

#### 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 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.
  Collapse this tableExpand this table

  Version | Product | SR_Level | Service branch
  --- | --- | --- | ---
  6.1.760 0 . 20xxx | Windows 7 and Windows Server 2008 R2 | RTM | LDR
  6.1.760 1 . 21xxx | 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 Server 2008 R2 and for Windows 7" 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

Collapse this tableExpand this table

File name | File version | File size | Date | Time | Platform
--- | --- | --- | --- | --- | ---
Mrxsmb10.sys | 6.1.7600.20861 | 221,696 | 18-Dec-2010 | 03:20 | x86
Mrxsmb10.sys | 6.1.7601.21624 | 223,232 | 18-Dec-2010 | 05:50 | x86

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

Collapse this tableExpand this table

File name | File version | File size | Date | Time | Platform
--- | --- | --- | --- | --- | ---
Mrxsmb10.sys | 6.1.7600.20861 | 286,720 | 18-Dec-2010 | 03:32 | x64
Mrxsmb10.sys | 6.1.7601.21624 | 287,744 | 18-Dec-2010 | 06:09 | x64

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

Collapse this tableExpand this table

File name | File version | File size | Date | Time | Platform
--- | --- | --- | --- | --- | ---
Mrxsmb10.sys | 6.1.7600.20861 | 673,792 | 18-Dec-2010 | 02:56 | IA-64
Mrxsmb10.sys | 6.1.7601.21624 | 675,840 | 18-Dec-2010 | 06:44 | IA-64

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## WORKAROUND

### Workaround for Windows 7 and for Windows Server 2008 R2

To work around this issue, you have to restart the computer.
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## STATUS

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

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684
(http://support.microsoft.com/kb/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

Collapse this tableExpand this table

File name | Update.mum
File version | Not applicable
File size | 2,773
Date (UTC) | 20-Dec-2010
Time (UTC) | 18:39
Platform | Not applicable
File name | X86_6f366e54fa3c832866d9d9a3a684ad90_31bf3856ad364e35_6.1.7601.21624_none_3f6d41f944d20775.manifest
File version | Not applicable
File size | 701
Date (UTC) | 20-Dec-2010
Time (UTC) | 18:39
Platform | Not applicable
File name | X86_9c8d6c57513a169b6a141c91ff783b99_31bf3856ad364e35_6.1.7600.20861_none_191d98bc3c05c62b.manifest
File version | Not applicable
File size | 701
Date (UTC) | 20-Dec-2010
Time (UTC) | 18:39
Platform | Not applicable
File name | X86_microsoft-windows-smb10-minirdr_31bf3856ad364e35_6.1.7600.20861_none_891624bfc5d33a1e.manifest
File version | Not applicable
File size | 3,962
Date (UTC) | 18-Dec-2010
Time (UTC) | 06:03
Platform | Not applicable
File name | X86_microsoft-windows-smb10-minirdr_31bf3856ad364e35_6.1.7601.21624_none_8b2ac253c2d6824b.manifest
File version | Not applicable
File size | 3,962
Date (UTC) | 18-Dec-2010
Time (UTC) | 08:37
Platform | Not applicable

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

Collapse this tableExpand this table

File name | Amd64_002f980073be4a8973ddf9de9d34a051_31bf3856ad364e35_6.1.7601.21624_none_ad9233ade71aace0.manifest
File version | Not applicable
File size | 705
Date (UTC) | 20-Dec-2010
Time (UTC) | 18:39
Platform | Not applicable
File name | Amd64_3fd29731152a6e6832a628c9bfbd81c8_31bf3856ad364e35_6.1.7600.20861_none_c8042b3e579d5f63.manifest
File version | Not applicable
File size | 705
Date (UTC) | 20-Dec-2010
Time (UTC) | 18:39
Platform | Not applicable
File name | Amd64_microsoft-windows-smb10-minirdr_31bf3856ad364e35_6.1.7600.20861_none_e534c0437e30ab54.manifest
File version | Not applicable
File size | 3,966
Date (UTC) | 18-Dec-2010
Time (UTC) | 07:01
Platform | Not applicable
File name | Amd64_microsoft-windows-smb10-minirdr_31bf3856ad364e35_6.1.7601.21624_none_e7495dd77b33f381.manifest
File version | Not applicable
File size | 3,966
Date (UTC) | 18-Dec-2010
Time (UTC) | 09:30
Platform | Not applicable
File name | Update.mum
File version | Not applicable
File size | 3,215
Date (UTC) | 20-Dec-2010
Time (UTC) | 18:39
Platform | Not applicable

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

Collapse this tableExpand this table

File name | Ia64_54f7471b111d548732784c3967b38608_31bf3856ad364e35_6.1.7600.20861_none_5114685baba39418.manifest
File version | Not applicable
File size | 703
Date (UTC) | 20-Dec-2010
Time (UTC) | 18:39
Platform | Not applicable
File name | Ia64_75f0c8d4459e7b8099b05c0e61a7d0f5_31bf3856ad364e35_6.1.7601.21624_none_a0fa1a58254875a7.manifest
File version | Not applicable
File size | 703
Date (UTC) | 20-Dec-2010
Time (UTC) | 18:39
Platform | Not applicable
File name | Ia64_microsoft-windows-smb10-minirdr_31bf3856ad364e35_6.1.7600.20861_none_8917c8b5c5d1431a.manifest
File version | Not applicable
File size | 3,964
Date (UTC) | 18-Dec-2010
Time (UTC) | 06:55
Platform | Not applicable
File name | Ia64_microsoft-windows-smb10-minirdr_31bf3856ad364e35_6.1.7601.21624_none_8b2c6649c2d48b47.manifest
File version | Not applicable
File size | 3,964
Date (UTC) | 18-Dec-2010
Time (UTC) | 10:02
Platform | Not applicable
File name | Update.mum
File version | Not applicable
File size | 2,168
Date (UTC) | 20-Dec-2010
Time (UTC) | 18:39
Platform | Not applicable

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## Properties

Article ID: 2444328 - Last Review: February 10, 2011 - Revision: 1.0

##### APPLIES TO

- Windows Server 2008 R2 Datacenter
- Windows Server 2008 R2 Enterprise
- Windows Server 2008 R2 for Itanium-Based Systems
- Windows Server 2008 R2 Foundation
- Windows Server 2008 R2 Standard
- Windows Web Server 2008 R2
- Windows 7 Enterprise
- Windows 7 Home Basic
- Windows 7 Home Premium
- Windows 7 Professional
- Windows 7 Starter
- Windows 7 Ultimate

##### Keywords:

kbautohotfix kbqfe kbhotfixserver kbfix kbsurveynew kbexpertiseinter KB2444328

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