INTRODUCTION

This article introduces an update for computers that are running Windows 7 or Windows Server 2008 R2 and that have a processor from one of the following series installed:

  • AMD FX

  • AMD Opteron 4200/4300

  • AMD Opteron 6200/6300

  • AMD Opteron Bulldozer

Currently, the CPU scheduling techniques that are used by Windows 7 and Windows Server 2008 R2 are not optimized for the AMD Bulldozer module architecture. This architecture is found on AMD FX series, AMD Opteron 4200/4300 Series, and AMD Opteron 6200/6300 Series processors. Therefore, multithreaded workloads may not be optimally distributed on computers that have one of these processors installed in a lightly-threaded environment. This may result in decreased system performance for some applications.

Important The power management policy for processor core parking on your computer may prevent this update from producing the desired performance increase. To disable core parking, install the hotfix that is described in Microsoft Knowledge Base (KB) article 2646060.

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=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 update, 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 update in this package, you do not have to make any changes to the registry.

Restart requirement

You may have to restart the computer after you apply this update.

Update replacement information

This update does not replace a previously released update.

File information

The English (United States) version of this update 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, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.

    Version

    Product

    SR_Level

    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

Ntkrnlpa.exe

6.1.7601.17730

3,968,368

24-Nov-2011

06:36

Not applicable

Ntoskrnl.exe

6.1.7601.17730

3,913,584

24-Nov-2011

06:36

Not applicable

Ntkrnlpa.exe

6.1.7601.21866

3,971,440

24-Nov-2011

06:33

Not applicable

Ntoskrnl.exe

6.1.7601.21866

3,916,656

24-Nov-2011

06:33

Not applicable

Powrprof.dll

6.1.7601.17730

145,920

24-Nov-2011

06:22

Powrprof.dll

6.1.7601.21866

145,920

24-Nov-2011

06:19

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

File name

File version

File size

Date

Time

Ntoskrnl.exe

6.1.7601.17730

5,559,152

24-Nov-2011

07:30

Ntoskrnl.exe

6.1.7601.21866

5,560,688

24-Nov-2011

07:22

Powrprof.dll

6.1.7601.17730

166,912

24-Nov-2011

07:17

Powrprof.dll

6.1.7601.21866

166,912

24-Nov-2011

07:11

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

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

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

X86_2dc11e5b8725bc103ad85d9014a63c9c_31bf3856ad364e35_6.1.7601.21866_none_16cb00e87fc3192e.manifest

File version

Not applicable

File size

697

Date (UTC)

24-Nov-2011

Time (UTC)

21:47

File name

X86_88c5023df903516a0c10fc42bbe18a1b_31bf3856ad364e35_6.1.7601.21866_none_54b4d01bb92b5a0a.manifest

File version

Not applicable

File size

707

Date (UTC)

24-Nov-2011

Time (UTC)

21:47

File name

X86_b7824833a4340cc0bc3d0b7c7f471380_31bf3856ad364e35_6.1.7601.17730_none_71048f0353670f5f.manifest

File version

Not applicable

File size

697

Date (UTC)

24-Nov-2011

Time (UTC)

21:47

File name

X86_db44d21e36e57293a4d87460fa4e0bf2_31bf3856ad364e35_6.1.7601.17730_none_281a4137bd4f8c6a.manifest

File version

Not applicable

File size

707

Date (UTC)

24-Nov-2011

Time (UTC)

21:47

File name

X86_microsoft-windows-os-kernel_31bf3856ad364e35_6.1.7601.17730_none_6e1e2e581278f847.manifest

File version

Not applicable

File size

16,151

Date (UTC)

24-Nov-2011

Time (UTC)

07:22

File name

X86_microsoft-windows-os-kernel_31bf3856ad364e35_6.1.7601.21866_none_6e8d5d1b2ba983ee.manifest

File version

Not applicable

File size

16,151

Date (UTC)

24-Nov-2011

Time (UTC)

07:23

File name

X86_microsoft-windows-userpowermanagement_31bf3856ad364e35_6.1.7601.17730_none_a5076b185b2e4550.manifest

File version

Not applicable

File size

3,069

Date (UTC)

24-Nov-2011

Time (UTC)

07:16

File name

X86_microsoft-windows-userpowermanagement_31bf3856ad364e35_6.1.7601.21866_none_a57699db745ed0f7.manifest

File version

Not applicable

File size

3,069

Date (UTC)

24-Nov-2011

Time (UTC)

07:16

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

File name

Amd64_2dc11e5b8725bc103ad85d9014a63c9c_31bf3856ad364e35_6.1.7601.21866_none_72e99c6c38208a64.manifest

File version

Not applicable

File size

699

Date (UTC)

24-Nov-2011

Time (UTC)

21:47

File name

Amd64_353308bd502801e6ce3b49f8762609e0_31bf3856ad364e35_6.1.7601.21866_none_2754f68f22bf6a87.manifest

File version

Not applicable

File size

1,062

Date (UTC)

24-Nov-2011

Time (UTC)

21:47

File name

Amd64_42c06791739a8341118fac980226ef13_31bf3856ad364e35_6.1.7601.21866_none_ffc2ef450274e471.manifest

File version

Not applicable

File size

1,042

Date (UTC)

24-Nov-2011

Time (UTC)

21:47

File name

Amd64_4a242f7b540bb3910de63c70553c18d5_31bf3856ad364e35_6.1.7601.17730_none_4edc930bd9612f8c.manifest

File version

Not applicable

File size

701

Date (UTC)

24-Nov-2011

Time (UTC)

21:47

File name

Amd64_776535ea1ac84184aea982d3fe99e184_31bf3856ad364e35_6.1.7601.17730_none_d10c726eaf1775a1.manifest

File version

Not applicable

File size

711

Date (UTC)

24-Nov-2011

Time (UTC)

21:47

File name

Amd64_7f218ae293910621bf56988e85af7091_31bf3856ad364e35_6.1.7601.21866_none_f94b4afde062b430.manifest

File version

Not applicable

File size

701

Date (UTC)

24-Nov-2011

Time (UTC)

21:47

File name

Amd64_88c5023df903516a0c10fc42bbe18a1b_31bf3856ad364e35_6.1.7601.21866_none_b0d36b9f7188cb40.manifest

File version

Not applicable

File size

709

Date (UTC)

24-Nov-2011

Time (UTC)

21:47

File name

Amd64_97906969ff7ba521367ba8a4ecb91492_31bf3856ad364e35_6.1.7601.21866_none_5de734ed64900f5b.manifest

File version

Not applicable

File size

711

Date (UTC)

24-Nov-2011

Time (UTC)

21:47

File name

Amd64_a3c24c92eae8d28602ee970cf0a54b16_31bf3856ad364e35_6.1.7601.17730_none_fe362fe6ee2da860.manifest

File version

Not applicable

File size

1,042

Date (UTC)

24-Nov-2011

Time (UTC)

21:47

File name

Amd64_b7824833a4340cc0bc3d0b7c7f471380_31bf3856ad364e35_6.1.7601.17730_none_cd232a870bc48095.manifest

File version

Not applicable

File size

699

Date (UTC)

24-Nov-2011

Time (UTC)

21:47

File name

Amd64_c6245ef6caa27d706f2b885da1bf9946_31bf3856ad364e35_6.1.7601.17730_none_084a17cb2cd864f7.manifest

File version

Not applicable

File size

1,062

Date (UTC)

24-Nov-2011

Time (UTC)

21:47

File name

Amd64_db44d21e36e57293a4d87460fa4e0bf2_31bf3856ad364e35_6.1.7601.17730_none_8438dcbb75acfda0.manifest

File version

Not applicable

File size

709

Date (UTC)

24-Nov-2011

Time (UTC)

21:47

File name

Amd64_microsoft-windows-os-kernel_31bf3856ad364e35_6.1.7601.17730_none_ca3cc9dbcad6697d.manifest

File version

Not applicable

File size

15,291

Date (UTC)

24-Nov-2011

Time (UTC)

08:18

File name

Amd64_microsoft-windows-os-kernel_31bf3856ad364e35_6.1.7601.21866_none_caabf89ee406f524.manifest

File version

Not applicable

File size

15,291

Date (UTC)

24-Nov-2011

Time (UTC)

08:11

File name

Amd64_microsoft-windows-userpowermanagement_31bf3856ad364e35_6.1.7601.17730_none_0126069c138bb686.manifest

File version

Not applicable

File size

3,073

Date (UTC)

24-Nov-2011

Time (UTC)

08:12

File name

Amd64_microsoft-windows-userpowermanagement_31bf3856ad364e35_6.1.7601.21866_none_0195355f2cbc422d.manifest

File version

Not applicable

File size

3,073

Date (UTC)

24-Nov-2011

Time (UTC)

08:04

Need more help?

Expand your skills
Explore Training
Get new features first
Join Microsoft Insiders

Was this information helpful?

What affected your experience?

Thank you for your feedback!

×