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Symptoms

A memory leak occurs in the Svchost.exe process on a computer that is running Windows Vista or Windows Server 2008. Additionally, the Svchost.exe process uses too much memory and uses memory at an increasing rate.

Cause

This issue is caused by a memory leak in the Nsisvc.dll file.

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 hotfix, you must be running Windows Vista Service Pack 2 (SP2) or Windows Server 2008 SP2.

For more information about how to obtain a Windows Vista service pack, click the following article number to view the article in the Microsoft Knowledge Base:

935791How to obtain the latest Windows Vista service pack

For more information about how to obtain a Windows Server 2008 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

968849How to obtain the latest service pack for Windows Server 2008

Registry information

To apply this hotfix, 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 Vista and Windows Server 2008 file information notes

Important Windows Vista hotfixes and Windows Server 2008 hotfixes are included in the same packages. However, only "Windows Vista" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows Vista" 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.

    Version

    Product

    SR_Level

    Service branch

    6.0.600
    2.
    22xxx

    Windows Vista and Windows Server 2008

    SP2

    LDR

  • 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 Vista and for Windows Server 2008" section. MUM files and MANIFEST files, and the associated security catalog (.cat) files, are extremely important 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 Vista and of Windows Server 2008


File name

File version

File size

Date

Time

Nsi.dll

6.0.6002.22911

8,192

09-Aug-2012

14:47

Nsiproxy.sys

6.0.6002.22911

16,384

09-Aug-2012

13:44

Nsisvc.dll

6.0.6002.22911

18,432

09-Aug-2012

14:47

Winnsi.dll

6.0.6002.22911

14,848

09-Aug-2012

14:48

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


File name

File version

File size

Date

Time

Platform

Nsi.dll

6.0.6002.22911

11,264

09-Aug-2012

15:23

x64

Nsiproxy.sys

6.0.6002.22911

24,064

09-Aug-2012

14:13

x64

Nsisvc.dll

6.0.6002.22911

24,576

09-Aug-2012

15:23

x64

Winnsi.dll

6.0.6002.22911

22,016

09-Aug-2012

15:24

x64

Nsi.dll

6.0.6002.22911

8,192

09-Aug-2012

14:47

x86

Winnsi.dll

6.0.6002.22911

14,848

09-Aug-2012

14:48

x86

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


File name

File version

File size

Date

Time

Platform

Nsi.dll

6.0.6002.22911

17,920

09-Aug-2012

14:16

IA-64

Nsiproxy.sys

6.0.6002.22911

49,664

09-Aug-2012

13:24

IA-64

Nsisvc.dll

6.0.6002.22911

53,248

09-Aug-2012

14:16

IA-64

Winnsi.dll

6.0.6002.22911

37,376

09-Aug-2012

14:18

IA-64

Nsi.dll

6.0.6002.22911

8,192

09-Aug-2012

14:47

x86

Winnsi.dll

6.0.6002.22911

14,848

09-Aug-2012

14:48

x86


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:

824684Description of the standard terminology that is used to describe Microsoft software updates

Additional file information

Additional file information for Windows Vista and for Windows Server 2008

Additional files for all supported x86-based versions of Windows Vista and of Windows Server 2008


File name

X86_a05468a0f300c165e231cb062a89b211_31bf3856ad364e35_6.0.6002.22911_none_a8a164cf092dab0b.manifest

File version

Not applicable

File size

699

Date (UTC)

09-Aug-2012

Time (UTC)

17:22

File name

X86_microsoft-windows-usermodensi_31bf3856ad364e35_6.0.6002.22911_none_74c876d2ddbeeb85.manifest

File version

Not applicable

File size

11,815

Date (UTC)

09-Aug-2012

Time (UTC)

15:03

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


File name

Amd64_207d68c0f9a60b301010126a380d26a8_31bf3856ad364e35_6.0.6002.22911_none_526a61d05fadac67.manifest

File version

Not applicable

File size

1,048

Date (UTC)

09-Aug-2012

Time (UTC)

17:22

File name

Amd64_microsoft-windows-usermodensi_31bf3856ad364e35_6.0.6002.22911_none_d0e71256961c5cbb.manifest

File version

Not applicable

File size

11,833

Date (UTC)

09-Aug-2012

Time (UTC)

15:44

File name

Wow64_microsoft-windows-usermodensi_31bf3856ad364e35_6.0.6002.22911_none_db3bbca8ca7d1eb6.manifest

File version

Not applicable

File size

7,616

Date (UTC)

09-Aug-2012

Time (UTC)

14:52

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


File name

Ia64_366d73e20e3c291ccff0bc051b5d64d2_31bf3856ad364e35_6.0.6002.22911_none_1137456b19eaef6b.manifest

File version

Not applicable

File size

1,046

Date (UTC)

09-Aug-2012

Time (UTC)

17:21

File name

Ia64_microsoft-windows-usermodensi_31bf3856ad364e35_6.0.6002.22911_none_74ca1ac8ddbcf481.manifest

File version

Not applicable

File size

11,824

Date (UTC)

09-Aug-2012

Time (UTC)

14:29

File name

Wow64_microsoft-windows-usermodensi_31bf3856ad364e35_6.0.6002.22911_none_db3bbca8ca7d1eb6.manifest

File version

Not applicable

File size

7,616

Date (UTC)

09-Aug-2012

Time (UTC)

14:52

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