Microcode update for Intel processors in Windows 7 or in Windows Server 2008 R2

Introduction

This article describes a microcode update for Intel processors. This update improves the reliability of x64-based versions of Windows that uses certain Intel processors. This update fixes an issue in which the operating system might function incorrectly. These issues are not common. These issues might affect processors that meet all the following conditions:

  • Designated as a Intel Xeon or Intel Core family processor that is based on the "Penryn" or "Merom" codenamed processors.

  • Has the Family, Model, and Stepping of family designations of 6, or a Model designation of 15, of 22, of 23, or of 29.

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=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 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 a 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


  • 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:

    Version

    Product

    Milestone

    Service branch

    6.1.760
    0.16xxx

    Windows 7 and Windows Server 2008 R2

    RTM

    GDR

    6.1.760
    0.20xxx

    Windows 7 and Windows Server 2008 R2

    RTM

    LDR

    6.1.760
    1.17xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    GDR

    6.1.760
    1.21xxx

    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 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 name

File version

File size

Date

Time

Platform

Mcupdate_genuineintel.dll

6.1.7600.16758

520,064

08-Feb-2011

05:58

x86

Mcupdate_genuineintel.dll

6.1.7600.20899

520,064

09-Feb-2011

06:50

x86

Mcupdate_genuineintel.dll

6.1.7601.17558

520,064

10-Feb-2011

08:38

x86

Mcupdate_genuineintel.dll

6.1.7601.21658

520,064

10-Feb-2011

08:28

x86

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

File name

File version

File size

Date

Time

Platform

Mcupdate_genuineintel.dll

6.1.7600.16758

299,392

08-Feb-2011

06:26

x64

Mcupdate_genuineintel.dll

6.1.7600.20899

299,392

09-Feb-2011

06:22

x64

Mcupdate_genuineintel.dll

6.1.7601.17558

299,392

10-Feb-2011

13:34

x64

Mcupdate_genuineintel.dll

6.1.7601.21658

299,392

10-Feb-2011

09:32

x64

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

File name

Update.mum

File version

Not applicable

File size

2,773

Date (UTC)

10-Feb-2011

Time (UTC)

22:19

Platform

Not applicable

File name

X86_0bd95343f1ba438ca69997f02b073299_31bf3856ad364e35_6.1.7600.16758_none_e7da16f30ed8802b.manifest

File version

Not applicable

File size

717

Date (UTC)

10-Feb-2011

Time (UTC)

22:19

Platform

Not applicable

File name

X86_936833dcccd69c98ff4a84002eaca97e_31bf3856ad364e35_6.1.7601.17558_none_52508ac69586e340.manifest

File version

Not applicable

File size

717

Date (UTC)

10-Feb-2011

Time (UTC)

22:19

Platform

Not applicable

File name

X86_9ccdd36dd833fc61d2c3a677277fa45c_31bf3856ad364e35_6.1.7600.20899_none_62d72567199ffcc1.manifest

File version

Not applicable

File size

717

Date (UTC)

10-Feb-2011

Time (UTC)

22:19

Platform

Not applicable

File name

X86_f03f816290e13c8a26eac7bfd14be722_31bf3856ad364e35_6.1.7601.21658_none_e5acb34f7f3aa4e5.manifest

File version

Not applicable

File size

717

Date (UTC)

10-Feb-2011

Time (UTC)

22:19

Platform

Not applicable

File name

X86_microsoft-windows-m..update-genuineintel_31bf3856ad364e35_6.1.7600.16758_none_bcb9dabf1385d083.manifest

File version

Not applicable

File size

2,530

Date (UTC)

08-Feb-2011

Time (UTC)

06:33

Platform

Not applicable

File name

X86_microsoft-windows-m..update-genuineintel_31bf3856ad364e35_6.1.7600.20899_none_bd1938242cc2f968.manifest

File version

Not applicable

File size

2,530

Date (UTC)

09-Feb-2011

Time (UTC)

07:32

Platform

Not applicable

File name

X86_microsoft-windows-m..update-genuineintel_31bf3856ad364e35_6.1.7601.17558_none_bea037c510ac3c6f.manifest

File version

Not applicable

File size

2,530

Date (UTC)

10-Feb-2011

Time (UTC)

09:07

Platform

Not applicable

File name

X86_microsoft-windows-m..update-genuineintel_31bf3856ad364e35_6.1.7601.21658_none_bf29d49029c9dc39.manifest

File version

Not applicable

File size

2,530

Date (UTC)

10-Feb-2011

Time (UTC)

08:56

Platform

Not applicable

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

File name

Amd64_19f9deb74f2966ad79811cd43144773d_31bf3856ad364e35_6.1.7601.17558_none_49d6bed2d4b9ca43.manifest

File version

Not applicable

File size

721

Date (UTC)

10-Feb-2011

Time (UTC)

22:19

Platform

Not applicable

File name

Amd64_6e95305e95b2f93524ead7229209dec9_31bf3856ad364e35_6.1.7601.21658_none_cab89e6affce15bb.manifest

File version

Not applicable

File size

721

Date (UTC)

10-Feb-2011

Time (UTC)

22:19

Platform

Not applicable

File name

Amd64_9e0cb36683f51917eb99bccf8514aa2e_31bf3856ad364e35_6.1.7600.16758_none_14ace3544b6b6c50.manifest

File version

Not applicable

File size

721

Date (UTC)

10-Feb-2011

Time (UTC)

22:19

Platform

Not applicable

File name

Amd64_c36e52ec9849efef445336c5450a9a98_31bf3856ad364e35_6.1.7600.20899_none_aa19b3ec372b7a63.manifest

File version

Not applicable

File size

721

Date (UTC)

10-Feb-2011

Time (UTC)

22:19

Platform

Not applicable

File name

Amd64_microsoft-windows-m..update-genuineintel_31bf3856ad364e35_6.1.7600.16758_none_18d87642cbe341b9.manifest

File version

Not applicable

File size

2,532

Date (UTC)

08-Feb-2011

Time (UTC)

07:10

Platform

Not applicable

File name

Amd64_microsoft-windows-m..update-genuineintel_31bf3856ad364e35_6.1.7600.20899_none_1937d3a7e5206a9e.manifest

File version

Not applicable

File size

2,532

Date (UTC)

09-Feb-2011

Time (UTC)

08:11

Platform

Not applicable

File name

Amd64_microsoft-windows-m..update-genuineintel_31bf3856ad364e35_6.1.7601.17558_none_1abed348c909ada5.manifest

File version

Not applicable

File size

2,532

Date (UTC)

10-Feb-2011

Time (UTC)

14:05

Platform

Not applicable

File name

Amd64_microsoft-windows-m..update-genuineintel_31bf3856ad364e35_6.1.7601.21658_none_1b487013e2274d6f.manifest

File version

Not applicable

File size

2,532

Date (UTC)

10-Feb-2011

Time (UTC)

10:02

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

3,215

Date (UTC)

10-Feb-2011

Time (UTC)

22:19

Platform

Not applicable

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