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Article ID: 2550581 - Last Review: August 15, 2011 - Revision: 2.0

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SYMPTOMS

Consider the following scenario:
  • You have a network share that is hosted on a computer that is running Windows Server 2008 or Windows Server 2008 R2 in a network environment.
  • You map a drive to the network share on a client computer that is running Windows 7, Windows Server 2008 R2, Windows Vista or Windows Server 2008.
  • You open some applications to query the extended attributes of the files on the network share.
  • You open Windows Explorer and then click the mapped drive to browse the files.
In this scenario, Windows Explorer stops responding for about 35 seconds.

CAUSE

This issue occurs because of the file control block (FCB) resource being locked unexpectedly before the client sends the CreateFile and QueryInformation requests to the server. Therefore, the client cannot handle the Oplock break notification request that is returned by the server. This behavior causes Windows redirector to temporarily stop responding.

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 Web site:
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 or Windows 7 Service Pack 1 (SP1)
  • Windows Server 2008 R2 SP1
  • Windows Vista SP2
  • Windows Server 2008 SP2
For more information about how to obtain a Windows 7 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
976932  (http://support.microsoft.com/kb/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 do not have to 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 note
Important Windows 7 and Windows Server 2008 R2 updates are included in the same packages.
  • 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:
    Collapse this tableExpand this table
    VersionProductSR_LevelService branch
    6.1.760 0 . 21xxxWindows 7 and Windows Server 2008 R2RTMLDR
    6.1.760 1 . 21xxxWindows 7 and Windows Server 2008 R2SP1LDR
  • The MANIFEST files (.manifest) that are installed for each environment are listed separately in the "Additional file information for Windows 7" section. 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 nameFile versionFile sizeDateTimePlatform
Mrxsmb20.sys6.1.7600.2100997,28015-Jul-201102:22x86
Mrxsmb20.sys6.1.7601.2177196,76815-Jul-201103:11x86
For all supported x64-based versions of Windows 7
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Mrxsmb20.sys6.1.7600.21009128,51215-Jul-201102:44x64
Mrxsmb20.sys6.1.7601.21771128,00015-Jul-201102:28x64
For all supported Windows Server 2008 R2 IA64
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Mrxsmb20.sys6.1.7600.21009312,83215-Jul-201101:50IA-64
Mrxsmb20.sys6.1.7601.21771310,27215-Jul-201101:49IA-64
For all supported Windows Vista/Windows Server 2008 X86
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Mrxsmb20.sys6.0.6002.2266980,38401-Jul-201112:55x86
For all supported Windows Server 2008 IA64
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Mrxsmb20.sys6.0.6002.22669266,75201-Jul-201113:27IA-64
For all supported Windows Vista/Windows Server 2008 x64
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Mrxsmb20.sys6.0.6002.22669108,03201-Jul-201113:18x64

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:
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

Additional files for all supported x86-based versions of Windows 7
Collapse this tableExpand this table
File nameX86_1f59fe4fdfceb3e01bba793db9bbb9d7_31bf3856ad364e35_6.1.7601.21771_none_cf8d4f747adbe9b6.manifest
File versionNot applicable
File size701
Date (UTC)15-Jul-2011
Time (UTC)19:41
PlatformNot applicable
File nameX86_98b647fa3a1fa51fb2310a7badab99d6_31bf3856ad364e35_6.1.7600.21009_none_2c74a1f8c9dd944c.manifest
File versionNot applicable
File size701
Date (UTC)15-Jul-2011
Time (UTC)19:41
PlatformNot applicable
File nameX86_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7600.21009_none_8b954ab203f2c10a.manifest
File versionNot applicable
File size4,035
Date (UTC)15-Jul-2011
Time (UTC)07:57
PlatformNot applicable
File nameX86_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7601.21771_none_8d281dd20158f293.manifest
File versionNot applicable
File size4,035
Date (UTC)15-Jul-2011
Time (UTC)06:16
PlatformNot applicable
Additional files for all supported x64-based versions of Windows 7
Collapse this tableExpand this table
File nameAmd64_9daacb8cea32acd8d5055bc816fd9268_31bf3856ad364e35_6.1.7601.21771_none_886b99e558b7d15c.manifest
File versionNot applicable
File size705
Date (UTC)15-Jul-2011
Time (UTC)19:41
PlatformNot applicable
File nameAmd64_ccd7361afe03337ae4a53c63ccdced80_31bf3856ad364e35_6.1.7600.21009_none_5e836a5ec8fbdeff.manifest
File versionNot applicable
File size705
Date (UTC)15-Jul-2011
Time (UTC)19:41
PlatformNot applicable
File nameAmd64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7600.21009_none_e7b3e635bc503240.manifest
File versionNot applicable
File size4,039
Date (UTC)15-Jul-2011
Time (UTC)08:53
PlatformNot applicable
File nameAmd64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7601.21771_none_e946b955b9b663c9.manifest
File versionNot applicable
File size4,039
Date (UTC)15-Jul-2011
Time (UTC)07:06
PlatformNot applicable
Additional files for all supported Windows Server 2008 R2 IA64
Collapse this tableExpand this table
File nameIa64_16eb1c3affe4eff380e835b14bcc7ab7_31bf3856ad364e35_6.1.7601.21771_none_a1905d4b615ac888.manifest
File versionNot Applicable
File size703
Date (UTC)15-Jul-2011
Time (UTC)19:41
PlatformNot Applicable
File nameIa64_75267fe26871e3a8a670985afac67bce_31bf3856ad364e35_6.1.7600.21009_none_450487b6f779f0a2.manifest
File versionNot Applicable
File size703
Date (UTC)15-Jul-2011
Time (UTC)19:41
PlatformNot Applicable
File nameIa64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7600.21009_none_8b96eea803f0ca06.manifest
File versionNot Applicable
File size4,037
Date (UTC)15-Jul-2011
Time (UTC)08:47
PlatformNot Applicable
File nameIa64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7601.21771_none_8d29c1c80156fb8f.manifest
File versionNot Applicable
File size4,037
Date (UTC)15-Jul-2011
Time (UTC)07:27
PlatformNot Applicable
File nameUpdate.mum
File versionNot Applicable
File size2,168
Date (UTC)15-Jul-2011
Time (UTC)19:41
PlatformNot Applicable
Additional files for all supported Windows Vista/Windows Server 2008 X86
Collapse this tableExpand this table
File nameUpdate.mum
File versionNot Applicable
File size3,078
Date (UTC)01-Jul-2011
Time (UTC)17:39
PlatformNot Applicable
File nameX86_56ce7ca320245f3e35c4a26ed1f7cf59_31bf3856ad364e35_6.0.6002.22669_none_818d3480648542e2.manifest
File versionNot Applicable
File size701
Date (UTC)01-Jul-2011
Time (UTC)17:39
PlatformNot Applicable
File nameX86_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.0.6002.22669_none_8d133690a0324ad1.manifest
File versionNot Applicable
File size6,960
Date (UTC)01-Jul-2011
Time (UTC)15:32
PlatformNot Applicable
Additional files for all supported Windows Server 2008 IA64
Collapse this tableExpand this table
File nameIa64_63b757ae536d3f017fb83c6da6f1f9ac_31bf3856ad364e35_6.0.6002.22669_none_405170f5643a9efc.manifest
File versionNot Applicable
File size703
Date (UTC)01-Jul-2011
Time (UTC)17:39
PlatformNot Applicable
File nameIa64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.0.6002.22669_none_8d14da86a03053cd.manifest
File versionNot Applicable
File size6,966
Date (UTC)01-Jul-2011
Time (UTC)15:38
PlatformNot Applicable
File nameUpdate.mum
File versionNot Applicable
File size2,255
Date (UTC)01-Jul-2011
Time (UTC)17:39
PlatformNot Applicable
Additional files for all supported Windows Vista/Windows Server 2008 x64
Collapse this tableExpand this table
File nameAmd64_c93ffdfcb6290a72d1cc2404d91a9569_31bf3856ad364e35_6.0.6002.22669_none_1be0dd82859b66e2.manifest
File versionNot Applicable
File size705
Date (UTC)01-Jul-2011
Time (UTC)17:39
PlatformNot Applicable
File nameAmd64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.0.6002.22669_none_e931d214588fbc07.manifest
File versionNot Applicable
File size6,972
Date (UTC)01-Jul-2011
Time (UTC)15:48
PlatformNot Applicable
File nameUpdate.mum
File versionNot Applicable
File size3,102
Date (UTC)01-Jul-2011
Time (UTC)17:39
PlatformNot Applicable

APPLIES TO
  • Windows 7 Enterprise
  • Windows 7 Home Basic
  • Windows 7 Home Premium
  • Windows 7 Professional
  • Windows 7 Ultimate
  • Windows 7 Starter
  • Windows Vista Enterprise
  • Windows Vista Home Basic
  • Windows Vista Ultimate
  • Windows Server 2008 Enterprise
  • Windows Server 2008 R2 Enterprise
  • Windows Vista Business
  • Windows Vista Home Premium
  • Windows Vista Starter
  • Windows Server 2008 Datacenter
  • Windows Server 2008 Foundation
  • Windows Server 2008 R2 Datacenter
  • Windows Server 2008 R2 Foundation
  • Windows Server 2008 R2 Standard
  • Windows Server 2008 Standard
Keywords: 
kbautohotfix kbqfe kbHotfixServer kbfix kbsurveynew kbexpertiseadvanced KB2550581
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