An update that improves the startup performance of Windows 7 and of Windows Server 2008 R2 is available

INTRODUCTION

An update is available that improves the startup performance of Windows 7 and of Windows Server 2008 R2.

More Information

Svchost.exe holds a lock on a service when the libraries for the service are loaded. This behavior prevents other services in the same Svchost.exe instance from starting until the call to the LoadLibrary function is returned.

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


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, 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, critical 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 7 and for Windows Server 2008 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. 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

Svchost.exe

6.1.7600.16770

21,504

01-Mar-2011

08:09

Svchost.exe

6.1.7600.20912

21,504

01-Mar-2011

08:07

Svchost.exe

6.1.7601.17568

21,504

01-Mar-2011

08:05

Svchost.exe

6.1.7601.21671

21,504

01-Mar-2011

08:07

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

File name

File version

File size

Date

Time

Svchost.exe

6.1.7600.16770

27,648

01-Mar-2011

08:09

Svchost.exe

6.1.7600.20912

27,648

01-Mar-2011

08:08

Svchost.exe

6.1.7601.17568

27,648

01-Mar-2011

08:07

Svchost.exe

6.1.7601.21671

27,648

01-Mar-2011

08:10

For all supported IA-64-based versions of Windows Server 2008 R2

File name

File version

File size

Date

Time

Svchost.exe

6.1.7600.16770

55,296

01-Mar-2011

08:00

Svchost.exe

6.1.7600.20912

55,296

01-Mar-2011

08:03

Svchost.exe

6.1.7601.17568

55,296

01-Mar-2011

07:58

Svchost.exe

6.1.7601.21671

55,296

01-Mar-2011

08:03

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

X86_0ba4e68b097db39bc615b937b5b05ad7_31bf3856ad364e35_6.1.7601.17568_none_4dae3afd6b43d7c3.manifest

File version

Not applicable

File size

704

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

X86_32209ce2896892eea4c219b5befa8f34_31bf3856ad364e35_6.1.7600.20912_none_861f467128f4d54f.manifest

File version

Not applicable

File size

704

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

X86_682d12e55d5d4b74164402cd96d9c6bd_31bf3856ad364e35_6.1.7601.21671_none_2d216daeb76cf164.manifest

File version

Not applicable

File size

704

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

X86_a4f103f4caa8f22d92c1ce4bc7d677ad_31bf3856ad364e35_6.1.7600.16770_none_b2ca450f88d9a37e.manifest

File version

Not applicable

File size

704

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

X86_microsoft-windows-services-svchost_31bf3856ad364e35_6.1.7600.16770_none_b59785d6669dad4e.manifest

File version

Not applicable

File size

6,333

Date (UTC)

01-Mar-2011

Time (UTC)

08:56

File name

X86_microsoft-windows-services-svchost_31bf3856ad364e35_6.1.7600.20912_none_b66404a37f88d547.manifest

File version

Not applicable

File size

6,333

Date (UTC)

01-Mar-2011

Time (UTC)

08:49

File name

X86_microsoft-windows-services-svchost_31bf3856ad364e35_6.1.7601.17568_none_b790b51863b4c801.manifest

File version

Not applicable

File size

6,333

Date (UTC)

01-Mar-2011

Time (UTC)

08:44

File name

X86_microsoft-windows-services-svchost_31bf3856ad364e35_6.1.7601.21671_none_b8087ff17ce0d25b.manifest

File version

Not applicable

File size

6,333

Date (UTC)

01-Mar-2011

Time (UTC)

08:50

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

File name

Amd64_0ba4e68b097db39bc615b937b5b05ad7_31bf3856ad364e35_6.1.7601.17568_none_a9ccd68123a148f9.manifest

File version

Not applicable

File size

706

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

Amd64_3037e4cb8c10b1f3d5c651d892d5f5a6_31bf3856ad364e35_6.1.7600.20912_none_b18e873d8b0b5240.manifest

File version

Not applicable

File size

708

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

Amd64_32209ce2896892eea4c219b5befa8f34_31bf3856ad364e35_6.1.7600.20912_none_e23de1f4e1524685.manifest

File version

Not applicable

File size

706

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

Amd64_4f50f2f4bbe1793a2587d61053fec453_31bf3856ad364e35_6.1.7600.16770_none_99e881efd23d3afc.manifest

File version

Not applicable

File size

1,056

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

Amd64_54ac6b63865d6c309ba2b1c69a2f7c22_31bf3856ad364e35_6.1.7601.17568_none_2f0de6ef6d523452.manifest

File version

Not applicable

File size

708

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

Amd64_5e76ee5ab233033b52a680c17783a762_31bf3856ad364e35_6.1.7600.20912_none_c5d8de9062f0d735.manifest

File version

Not applicable

File size

1,056

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

Amd64_682d12e55d5d4b74164402cd96d9c6bd_31bf3856ad364e35_6.1.7601.21671_none_894009326fca629a.manifest

File version

Not applicable

File size

706

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

Amd64_7643d15978d76faab2f258c4c3300b1a_31bf3856ad364e35_6.1.7600.16770_none_3fa5172018c1640e.manifest

File version

Not applicable

File size

708

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

Amd64_a4f103f4caa8f22d92c1ce4bc7d677ad_31bf3856ad364e35_6.1.7600.16770_none_0ee8e093413714b4.manifest

File version

Not applicable

File size

706

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

Amd64_cfe144ba05748b47726127ff8b4ca6b9_31bf3856ad364e35_6.1.7601.17568_none_88b06443b6c96af2.manifest

File version

Not applicable

File size

1,056

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

Amd64_d7cb8e82a553956d7682f9726e9fbfee_31bf3856ad364e35_6.1.7601.21671_none_b96d9e6ea9303c41.manifest

File version

Not applicable

File size

708

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

Amd64_fbbab3365430eaeb0deb1defb379a74f_31bf3856ad364e35_6.1.7601.21671_none_ea8d662204db20f5.manifest

File version

Not applicable

File size

1,056

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

Amd64_microsoft-windows-services-svchost_31bf3856ad364e35_6.1.7600.16770_none_11b6215a1efb1e84.manifest

File version

Not applicable

File size

6,467

Date (UTC)

01-Mar-2011

Time (UTC)

09:46

File name

Amd64_microsoft-windows-services-svchost_31bf3856ad364e35_6.1.7600.20912_none_1282a02737e6467d.manifest

File version

Not applicable

File size

6,467

Date (UTC)

01-Mar-2011

Time (UTC)

09:41

File name

Amd64_microsoft-windows-services-svchost_31bf3856ad364e35_6.1.7601.17568_none_13af509c1c123937.manifest

File version

Not applicable

File size

6,467

Date (UTC)

01-Mar-2011

Time (UTC)

09:43

File name

Amd64_microsoft-windows-services-svchost_31bf3856ad364e35_6.1.7601.21671_none_14271b75353e4391.manifest

File version

Not applicable

File size

6,467

Date (UTC)

01-Mar-2011

Time (UTC)

09:44

Additional files for all supported IA-64-based versions of Windows Server 2008 R2

File name

Ia64_0b13a2f0553cd9ea35a397b1fec43e03_31bf3856ad364e35_6.1.7601.21671_none_d8b4f22a4db74903.manifest

File version

Not applicable

File size

706

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

Ia64_0ba4e68b097db39bc615b937b5b05ad7_31bf3856ad364e35_6.1.7601.17568_none_4dafdef36b41e0bf.manifest

File version

Not applicable

File size

705

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

Ia64_1b6193b4a7673b8b3c9f92a4089ba556_31bf3856ad364e35_6.1.7600.16770_none_bbf4a74f0eb0334d.manifest

File version

Not applicable

File size

706

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

Ia64_32209ce2896892eea4c219b5befa8f34_31bf3856ad364e35_6.1.7600.20912_none_8620ea6728f2de4b.manifest

File version

Not applicable

File size

705

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

Ia64_4fbd3ba0da2a2e0d832ae0363f557e4d_31bf3856ad364e35_6.1.7601.17568_none_de2d676fa5ffb26f.manifest

File version

Not applicable

File size

706

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

Ia64_4fd2bbc7abac6e9143a8cb8ee10d08a6_31bf3856ad364e35_6.1.7600.20912_none_21a318760b77c404.manifest

File version

Not applicable

File size

706

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

Ia64_682d12e55d5d4b74164402cd96d9c6bd_31bf3856ad364e35_6.1.7601.21671_none_2d2311a4b76afa60.manifest

File version

Not applicable

File size

705

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

Ia64_a4f103f4caa8f22d92c1ce4bc7d677ad_31bf3856ad364e35_6.1.7600.16770_none_b2cbe90588d7ac7a.manifest

File version

Not applicable

File size

705

Date (UTC)

01-Mar-2011

Time (UTC)

22:17

File name

Ia64_microsoft-windows-services-svchost_31bf3856ad364e35_6.1.7600.16770_none_b59929cc669bb64a.manifest

File version

Not applicable

File size

6,465

Date (UTC)

01-Mar-2011

Time (UTC)

09:37

File name

Ia64_microsoft-windows-services-svchost_31bf3856ad364e35_6.1.7600.20912_none_b665a8997f86de43.manifest

File version

Not applicable

File size

6,465

Date (UTC)

01-Mar-2011

Time (UTC)

09:38

File name

Ia64_microsoft-windows-services-svchost_31bf3856ad364e35_6.1.7601.17568_none_b792590e63b2d0fd.manifest

File version

Not applicable

File size

6,465

Date (UTC)

01-Mar-2011

Time (UTC)

09:35

File name

Ia64_microsoft-windows-services-svchost_31bf3856ad364e35_6.1.7601.21671_none_b80a23e77cdedb57.manifest

File version

Not applicable

File size

6,465

Date (UTC)

01-Mar-2011

Time (UTC)

09:41

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