File corruption occurs when you perform file operations on a file server that is running Windows 7 or Windows Server 2008 R2

Article ID: 2559767 - View products that this article applies to.
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SYMPTOMS

Consider the following scenario:
  • You have a file server that is running Windows 7 or Windows Server 2008 R2.
  • You perform a file operation on the file server from a client computer that is running one of the following operating systems:
    • Windows Vista
    • Windows 7
    • Windows Server 2008
    • Windows Server 2008 R2
In this scenario, file corruption occurs on the file server.

CAUSE

This issue occurs because of an error in Server Message Block (SMB) 2.1.

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
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 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
    VersionProductSR_LevelService branch
    6.1.760 0 . 20xxxWindows 7 and Windows Server 2008 R2RTMLDR
    6.1.760 1 . 21xxxWindows 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
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Rdbss.sys6.1.7600.21180245,76004-Apr-201202:26x86
Rdbss.sys6.1.7601.21957245,76004-Apr-201202:13x86
Mrxsmb20.sys6.1.7600.2118097,28004-Apr-201202:26x86
Mrxsmb20.sys6.1.7601.2195796,76804-Apr-201202:13x86
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Rdbss.sys6.1.7600.21180314,88004-Apr-201202:43x64
Rdbss.sys6.1.7601.21957314,88004-Apr-201202:33x64
Mrxsmb20.sys6.1.7600.21180128,51204-Apr-201202:42x64
Mrxsmb20.sys6.1.7601.21957128,00004-Apr-201202:31x64
For all supported IA-64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Rdbss.sys6.1.7600.21180732,67204-Apr-201201:58IA-64
Rdbss.sys6.1.7601.21957733,18404-Apr-201201:50IA-64
Mrxsmb20.sys6.1.7600.21180313,34404-Apr-201201:58IA-64
Mrxsmb20.sys6.1.7601.21957310,78404-Apr-201201:50IA-64

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 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 nameX86_a002a2256285b5fc61adc38333952eee_31bf3856ad364e35_6.1.7601.21957_none_fb3bdf6bd0d57ae4.manifest
File versionNot applicable
File size701
Date (UTC)04-Apr-2012
Time (UTC)09:24
PlatformNot applicable
File nameX86_a5b11e6969c74043844af1c9c11f684c_31bf3856ad364e35_6.1.7601.21957_none_f9d72d5d8f482efc.manifest
File versionNot applicable
File size693
Date (UTC)04-Apr-2012
Time (UTC)09:24
PlatformNot applicable
File nameX86_da145081fbada113fbb7086c3344d31b_31bf3856ad364e35_6.1.7600.21180_none_b3a0943fcd463012.manifest
File versionNot applicable
File size701
Date (UTC)04-Apr-2012
Time (UTC)09:24
PlatformNot applicable
File nameX86_e54c376df80276ae4e63900c796fb869_31bf3856ad364e35_6.1.7600.21180_none_803c244b39db7564.manifest
File versionNot applicable
File size693
Date (UTC)04-Apr-2012
Time (UTC)09:24
PlatformNot applicable
File nameX86_microsoft-windows-rdbss_31bf3856ad364e35_6.1.7600.21180_none_5a2faccedbdf4848.manifest
File versionNot applicable
File size21,803
Date (UTC)04-Apr-2012
Time (UTC)05:10
PlatformNot applicable
File nameX86_microsoft-windows-rdbss_31bf3856ad364e35_6.1.7601.21957_none_5c3da562d8e6dba7.manifest
File versionNot applicable
File size21,803
Date (UTC)04-Apr-2012
Time (UTC)04:55
PlatformNot applicable
File nameX86_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7600.21180_none_8b35ca9e043bb9aa.manifest
File versionNot applicable
File size4,035
Date (UTC)04-Apr-2012
Time (UTC)05:06
PlatformNot applicable
File nameX86_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7601.21957_none_8d43c33201434d09.manifest
File versionNot applicable
File size4,035
Date (UTC)04-Apr-2012
Time (UTC)04:56
PlatformNot applicable
Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
Collapse this tableExpand this table
File nameAmd64_0071989b533a0580e8072c77cea7ec1e_31bf3856ad364e35_6.1.7601.21957_none_fe4c66b173f786ac.manifest
File versionNot applicable
File size697
Date (UTC)04-Apr-2012
Time (UTC)09:24
PlatformNot applicable
File nameAmd64_43b4c823936ee15ce792c14b19f393f7_31bf3856ad364e35_6.1.7600.21180_none_b44bee5412db9cca.manifest
File versionNot applicable
File size705
Date (UTC)04-Apr-2012
Time (UTC)09:24
PlatformNot applicable
File nameAmd64_a323169c2424063853245dee9c7e3e39_31bf3856ad364e35_6.1.7600.21180_none_5eac73a39a06211f.manifest
File versionNot applicable
File size697
Date (UTC)04-Apr-2012
Time (UTC)09:24
PlatformNot applicable
File nameAmd64_f8aae98d02ecb4ff054e152cc9203890_31bf3856ad364e35_6.1.7601.21957_none_b892e8d536a93e93.manifest
File versionNot applicable
File size705
Date (UTC)04-Apr-2012
Time (UTC)09:24
PlatformNot applicable
File nameAmd64_microsoft-windows-rdbss_31bf3856ad364e35_6.1.7600.21180_none_b64e4852943cb97e.manifest
File versionNot applicable
File size21,809
Date (UTC)04-Apr-2012
Time (UTC)06:04
PlatformNot applicable
File nameAmd64_microsoft-windows-rdbss_31bf3856ad364e35_6.1.7601.21957_none_b85c40e691444cdd.manifest
File versionNot applicable
File size21,809
Date (UTC)04-Apr-2012
Time (UTC)05:59
PlatformNot applicable
File nameAmd64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7600.21180_none_e7546621bc992ae0.manifest
File versionNot applicable
File size4,039
Date (UTC)04-Apr-2012
Time (UTC)06:04
PlatformNot applicable
File nameAmd64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7601.21957_none_e9625eb5b9a0be3f.manifest
File versionNot applicable
File size4,039
Date (UTC)04-Apr-2012
Time (UTC)05:59
PlatformNot applicable
Additional files for all supported IA-64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameIa64_5665937f25dc205d8a051edb80ecc3ca_31bf3856ad364e35_6.1.7600.21180_none_7a4917532c4f48eb.manifest
File versionNot applicable
File size695
Date (UTC)04-Apr-2012
Time (UTC)09:24
PlatformNot applicable
File nameIa64_8e5d5a4b6fd649ae5301c22663bacbd7_31bf3856ad364e35_6.1.7601.21957_none_0198bda86ba77e19.manifest
File versionNot applicable
File size695
Date (UTC)04-Apr-2012
Time (UTC)09:24
PlatformNot applicable
File nameIa64_cbc264e350a313da3cb247a15341b190_31bf3856ad364e35_6.1.7601.21957_none_757957413e5b7d48.manifest
File versionNot applicable
File size703
Date (UTC)04-Apr-2012
Time (UTC)09:24
PlatformNot applicable
File nameIa64_e60c10b9f9620fdce7f143c326c92fd1_31bf3856ad364e35_6.1.7600.21180_none_c9210e46727f9364.manifest
File versionNot applicable
File size703
Date (UTC)04-Apr-2012
Time (UTC)09:24
PlatformNot applicable
File nameIa64_microsoft-windows-rdbss_31bf3856ad364e35_6.1.7600.21180_none_5a3150c4dbdd5144.manifest
File versionNot applicable
File size21,806
Date (UTC)04-Apr-2012
Time (UTC)06:00
PlatformNot applicable
File nameIa64_microsoft-windows-rdbss_31bf3856ad364e35_6.1.7601.21957_none_5c3f4958d8e4e4a3.manifest
File versionNot applicable
File size21,806
Date (UTC)04-Apr-2012
Time (UTC)05:51
PlatformNot applicable
File nameIa64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7600.21180_none_8b376e940439c2a6.manifest
File versionNot applicable
File size4,037
Date (UTC)04-Apr-2012
Time (UTC)06:00
PlatformNot applicable
File nameIa64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7601.21957_none_8d45672801415605.manifest
File versionNot applicable
File size4,037
Date (UTC)04-Apr-2012
Time (UTC)05:51
PlatformNot applicable

Properties

Article ID: 2559767 - Last Review: May 9, 2012 - Revision: 1.0
APPLIES TO
  • Windows 7 Enterprise
  • Windows 7 Home Basic
  • Windows 7 Home Premium
  • Windows 7 Professional
  • Windows 7 Starter
  • Windows 7 Ultimate
  • 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
Keywords: 
kbautohotfix kbqfe kbhotfixserver kbfix kbexpertiseinter kbsurveynew KB2559767

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