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"An unexpected network error occurred" error message when you try to browse a DFS folder in Windows 7 or in Windows Server 2008 R2

View products that this article applies to.

Symptoms

Consider the following scenario:
  • You have a Distributed File System Namespace (DFSN) that consists of two file servers.

    Note The file servers can be either Windows-based or third party-based. For example, the file servers can be Windows Server 2008 R2-based servers or Samba servers.
  • You create a share on each file server.
  • You select the No files or programs from the shared folder are available offline option in the Properties dialog box of each share folder if the file servers are Windows-based and support the Offline Files feature.

    Note This operation prevents the client computers from performing offline caching on the contents of each share folder.
  • You create a new DFS folder within the DFSN, and then you add the UNC paths of the two shares as the targets of the DFS folder.
  • You enable Client-Side Caching (CSC) on a client computer that is running Windows 7 or Windows Server 2008 R2.
  • You try to browse the DFS folder by using Windows Explorer on the client computer.
In this situation, you receive the following error message intermittently:

An unexpected network error occurred

Additionally, when you open a sub folder, Windows Explorer either does not display the contents of the folder or jumps to the parent folder. This behavior occurs if you have several levels of folders in the share.

If you copy files from the DFS folder to the client computer, you receive the following error message:

0x8007003b, An unexpected network error occurred.

Note This issue does not occur if CSC is disabled on the client computer.

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Resolution

To resolve this issue, install the hotfix on the client computer that is running Windows 7 or Windows Server 2008 R2.

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
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)
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 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
  • 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:
    VersionProductMilestoneService branch
    6.1.760
    0.21xxx    		Windows 7 and Windows Server 2008 R2RTMLDR
    6.1.760
    1.21xxx    		Windows 7 and Windows Server 2008 R2SP1LDR
  • 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
File nameFile versionFile sizeDateTimePlatform
Cscapi.dll6.1.7600.2111034,81620-Dec-201105:34x86
Cscdll.dll6.1.7600.2111023,04020-Dec-201105:34x86
Cscapi.dll6.1.7601.2188034,81620-Dec-201107:00x86
Cscdll.dll6.1.7601.2188023,04020-Dec-201107:00x86
Csc.sys6.1.7600.21110387,58420-Dec-201103:27x86
Cscmig.dll6.1.7600.21110109,56820-Dec-201105:34x86
Microsoft-windows-offlinefiles-core-ppdlic.xrm-msNot Applicable3,14420-Dec-201105:54Not Applicable
Csc.sys6.1.7601.21880388,09620-Dec-201104:15x86
Cscmig.dll6.1.7601.21880109,56820-Dec-201107:00x86
Microsoft-windows-offlinefiles-core-ppdlic.xrm-msNot Applicable3,14420-Dec-201107:21Not Applicable
Cscsvc.dll6.1.7600.21110546,81620-Dec-201105:34x86
Microsoft-windows-offlinefiles.mofNot Applicable1,77619-Dec-201123:58Not Applicable
Cscsvc.dll6.1.7601.21880547,32820-Dec-201107:00x86
Microsoft-windows-offlinefiles.mofNot Applicable1,77620-Dec-201100:01Not Applicable
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatform
Cscapi.dll6.1.7600.2111046,08020-Dec-201106:26x64
Cscdll.dll6.1.7600.2111030,20820-Dec-201106:26x64
Cscapi.dll6.1.7601.2188046,08020-Dec-201106:16x64
Cscdll.dll6.1.7601.2188030,20820-Dec-201106:16x64
Csc.sys6.1.7600.21110513,53620-Dec-201103:47x64
Cscmig.dll6.1.7600.21110137,21620-Dec-201106:26x64
Microsoft-windows-offlinefiles-core-ppdlic.xrm-msNot Applicable3,14420-Dec-201106:47Not Applicable
Csc.sys6.1.7601.21880515,07220-Dec-201103:35x64
Cscmig.dll6.1.7601.21880137,21620-Dec-201106:16x64
Microsoft-windows-offlinefiles-core-ppdlic.xrm-msNot Applicable3,14420-Dec-201106:34Not Applicable
Cscsvc.dll6.1.7600.21110693,24820-Dec-201106:26x64
Microsoft-windows-offlinefiles.mofNot Applicable1,77619-Dec-201123:57Not Applicable
Cscsvc.dll6.1.7601.21880693,24820-Dec-201106:16x64
Microsoft-windows-offlinefiles.mofNot Applicable1,77619-Dec-201123:52Not Applicable
Cscapi.dll6.1.7600.2111034,81620-Dec-201105:34x86
Cscdll.dll6.1.7600.2111023,04020-Dec-201105:34x86
Cscapi.dll6.1.7601.2188034,81620-Dec-201107:00x86
Cscdll.dll6.1.7601.2188023,04020-Dec-201107:00x86

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Workaround

To work around this issue, use the following command to disable CSC:
wmic path win32_offlinfilescache call enable false

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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 DFS, visit the following Microsoft website:
General information to DFS
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 nameX86_47246d2666f60185913a9a5414138f32_31bf3856ad364e35_6.1.7601.21880_none_337bddf46b85ad85.manifest
File versionNot Applicable
File size1,057
Date (UTC)20-Dec-2011
Time (UTC)16:59
PlatformNot Applicable
File nameX86_9f940dbb04aa8a2e1b03bca689fbc73c_31bf3856ad364e35_6.1.7601.21880_none_d2c6b5979a502e9e.manifest
File versionNot Applicable
File size711
Date (UTC)20-Dec-2011
Time (UTC)16:59
PlatformNot Applicable
File nameX86_d3cb11aab9d8c4d8d35d4a9a75cfb2b2_31bf3856ad364e35_6.1.7600.21110_none_a1551e160da01fda.manifest
File versionNot Applicable
File size1,057
Date (UTC)20-Dec-2011
Time (UTC)16:59
PlatformNot Applicable
File nameX86_ff0649827e9826515c6f771a38b84d67_31bf3856ad364e35_6.1.7600.21110_none_7794d180e8890ed4.manifest
File versionNot Applicable
File size711
Date (UTC)20-Dec-2011
Time (UTC)16:59
PlatformNot Applicable
File nameX86_microsoft-windows-o..inefiles-win32-apis_31bf3856ad364e35_6.1.7600.21110_none_ac117e4773624f0d.manifest
File versionNot Applicable
File size3,017
Date (UTC)20-Dec-2011
Time (UTC)06:09
PlatformNot Applicable
File nameX86_microsoft-windows-o..inefiles-win32-apis_31bf3856ad364e35_6.1.7601.21880_none_adac53b770c14b4e.manifest
File versionNot Applicable
File size3,017
Date (UTC)20-Dec-2011
Time (UTC)07:35
PlatformNot Applicable
File nameX86_microsoft-windows-offlinefiles-core_31bf3856ad364e35_6.1.7600.21110_none_9eeecd5dd6245f33.manifest
File versionNot Applicable
File size11,592
Date (UTC)20-Dec-2011
Time (UTC)06:09
PlatformNot Applicable
File nameX86_microsoft-windows-offlinefiles-core_31bf3856ad364e35_6.1.7601.21880_none_a089a2cdd3835b74.manifest
File versionNot Applicable
File size11,592
Date (UTC)20-Dec-2011
Time (UTC)07:35
PlatformNot Applicable
File nameX86_microsoft-windows-offlinefiles-service_31bf3856ad364e35_6.1.7600.21110_none_0a7a1680db9d5997.manifest
File versionNot Applicable
File size56,703
Date (UTC)20-Dec-2011
Time (UTC)06:11
PlatformNot Applicable
File nameX86_microsoft-windows-offlinefiles-service_31bf3856ad364e35_6.1.7601.21880_none_0c14ebf0d8fc55d8.manifest
File versionNot Applicable
File size56,703
Date (UTC)20-Dec-2011
Time (UTC)07:40
PlatformNot Applicable
Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
File nameAmd64_3ecd44d529d039ca9b07fc9608106780_31bf3856ad364e35_6.1.7600.21110_none_c60a67d9be46e6b1.manifest
File versionNot Applicable
File size1,063
Date (UTC)20-Dec-2011
Time (UTC)16:59
PlatformNot Applicable
File nameAmd64_4bd0994aa18dc8fa964e20ad61b3dc67_31bf3856ad364e35_6.1.7601.21880_none_d5fcab12e9315cf5.manifest
File versionNot Applicable
File size1,070
Date (UTC)20-Dec-2011
Time (UTC)16:59
PlatformNot Applicable
File nameAmd64_5bdddf865b99c007b7224dc233ee5ad6_31bf3856ad364e35_6.1.7601.21880_none_21770b3cb4715bd1.manifest
File versionNot Applicable
File size715
Date (UTC)20-Dec-2011
Time (UTC)16:59
PlatformNot Applicable
File nameAmd64_66b9afa21b10c6fdf0d4366190b31d8c_31bf3856ad364e35_6.1.7601.21880_none_28d382d5c48f9439.manifest
File versionNot Applicable
File size1,063
Date (UTC)20-Dec-2011
Time (UTC)16:59
PlatformNot Applicable
File nameAmd64_9f940dbb04aa8a2e1b03bca689fbc73c_31bf3856ad364e35_6.1.7601.21880_none_2ee5511b52ad9fd4.manifest
File versionNot Applicable
File size713
Date (UTC)20-Dec-2011
Time (UTC)16:59
PlatformNot Applicable
File nameAmd64_adc48635690ac974998d31d55fc99dc8_31bf3856ad364e35_6.1.7600.21110_none_fb3f3c14a891a14d.manifest
File versionNot Applicable
File size715
Date (UTC)20-Dec-2011
Time (UTC)16:59
PlatformNot Applicable
File nameAmd64_c656d8ac210060c63409cb20a4c5f41b_31bf3856ad364e35_6.1.7600.21110_none_9a4cf2c4072b8513.manifest
File versionNot Applicable
File size1,070
Date (UTC)20-Dec-2011
Time (UTC)16:59
PlatformNot Applicable
File nameAmd64_ff0649827e9826515c6f771a38b84d67_31bf3856ad364e35_6.1.7600.21110_none_d3b36d04a0e6800a.manifest
File versionNot Applicable
File size713
Date (UTC)20-Dec-2011
Time (UTC)16:59
PlatformNot Applicable
File nameAmd64_microsoft-windows-o..inefiles-win32-apis_31bf3856ad364e35_6.1.7600.21110_none_083019cb2bbfc043.manifest
File versionNot Applicable
File size3,019
Date (UTC)20-Dec-2011
Time (UTC)07:00
PlatformNot Applicable
File nameAmd64_microsoft-windows-o..inefiles-win32-apis_31bf3856ad364e35_6.1.7601.21880_none_09caef3b291ebc84.manifest
File versionNot Applicable
File size3,019
Date (UTC)20-Dec-2011
Time (UTC)08:10
PlatformNot Applicable
File nameAmd64_microsoft-windows-offlinefiles-core_31bf3856ad364e35_6.1.7600.21110_none_fb0d68e18e81d069.manifest
File versionNot Applicable
File size11,596
Date (UTC)20-Dec-2011
Time (UTC)07:00
PlatformNot Applicable
File nameAmd64_microsoft-windows-offlinefiles-core_31bf3856ad364e35_6.1.7601.21880_none_fca83e518be0ccaa.manifest
File versionNot Applicable
File size11,596
Date (UTC)20-Dec-2011
Time (UTC)08:09
PlatformNot Applicable
File nameAmd64_microsoft-windows-offlinefiles-service_31bf3856ad364e35_6.1.7600.21110_none_6698b20493facacd.manifest
File versionNot Applicable
File size56,710
Date (UTC)20-Dec-2011
Time (UTC)07:05
PlatformNot Applicable
File nameAmd64_microsoft-windows-offlinefiles-service_31bf3856ad364e35_6.1.7601.21880_none_683387749159c70e.manifest
File versionNot Applicable
File size56,710
Date (UTC)20-Dec-2011
Time (UTC)08:14
PlatformNot Applicable
File nameX86_microsoft-windows-o..inefiles-win32-apis_31bf3856ad364e35_6.1.7600.21110_none_ac117e4773624f0d.manifest
File versionNot Applicable
File size3,017
Date (UTC)20-Dec-2011
Time (UTC)06:09
PlatformNot Applicable
File nameX86_microsoft-windows-o..inefiles-win32-apis_31bf3856ad364e35_6.1.7601.21880_none_adac53b770c14b4e.manifest
File versionNot Applicable
File size3,017
Date (UTC)20-Dec-2011
Time (UTC)07:35
PlatformNot Applicable

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Keywords: kbautohotfix, kbqfe, kbhotfixserver, kbfix, kbsurveynew, kbexpertiseinter, kb

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Article Info
Article ID : 2649905
Revision : 1
Created on : 3/21/2017
Published on : 2/16/2012
Exists online : False
Views : 210