Symptoms

Consider the following scenario:

  • You install an x64-based version of Windows 7 Service Pack 1 (SP1) or of Windows Server 2008 R2 Service Pack 1 (SP1) on a computer that has the XState feature enabled.

  • A memory dump file is generated on the computer.

    Note A memory dump file is generated when the system crashes and a Stop error occurs.

  • You use the WinDbg command to open the memory dump file on the computer.

In this scenario, the processor context is displayed incorrectly. Additionally, you receive the following error message:

The context is partially valid. Only x86 user-mode context is available.
The wow64exts extension must be loaded to access 32-bit state.
.load wow64exts will do this if you haven't loaded it already.

Cause

This issue occurs because the dump generation logic saves the processor context to the dump file incorrectly on a computer that has the XState feature enabled.

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 Windows 7 Service Pack 1 (SP1) or 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
    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 x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Ntoskrnl.exe

6.1.7601.17591

5,562,240

08-Apr-2011

07:46

x64

Ntoskrnl.exe

6.1.7601.21700

5,562,240

08-Apr-2011

07:28

x64

Ntkrnlpa.exe

6.1.7601.17591

3,967,872

08-Apr-2011

07:35

Not applicable

Ntoskrnl.exe

6.1.7601.17591

3,912,576

08-Apr-2011

07:35

Not applicable

Ntkrnlpa.exe

6.1.7601.21700

3,967,872

08-Apr-2011

06:47

Not applicable

Ntoskrnl.exe

6.1.7601.21700

3,912,576

08-Apr-2011

06:47

Not applicable

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

File name

File version

File size

Date

Time

Platform

Ntoskrnl.exe

6.1.7601.17591

11,118,464

08-Apr-2011

06:28

IA-64

Ntoskrnl.exe

6.1.7601.21700

11,118,976

08-Apr-2011

06:34

IA-64

Ntkrnlpa.exe

6.1.7601.17591

3,967,872

08-Apr-2011

07:35

Not applicable

Ntoskrnl.exe

6.1.7601.17591

3,912,576

08-Apr-2011

07:35

Not applicable

Ntkrnlpa.exe

6.1.7601.21700

3,967,872

08-Apr-2011

06:47

Not applicable

Ntoskrnl.exe

6.1.7601.21700

3,912,576

08-Apr-2011

06:47

Not applicable

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

More Information

The XState constants are flag bits for extended processor features that might be available to kernel-mode drivers.

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 x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

Amd64_2919ba5000c25bc482fbebff7e3e080c_31bf3856ad364e35_6.1.7601.17591_none_a29d5b29d47581bb.manifest

File version

Not applicable

File size

701

Date (UTC)

08-Apr-2011

Time (UTC)

18:30

Platform

Not applicable

File name

Amd64_3d81f7f338c55816dc85118b4a57a4c8_31bf3856ad364e35_6.1.7601.21700_none_ac874be5532ec634.manifest

File version

Not applicable

File size

1,042

Date (UTC)

08-Apr-2011

Time (UTC)

18:30

Platform

Not applicable

File name

Amd64_84a719080861e031c5078e329f1f34c2_31bf3856ad364e35_6.1.7601.21700_none_2622f5c098d0e875.manifest

File version

Not applicable

File size

699

Date (UTC)

08-Apr-2011

Time (UTC)

18:30

Platform

Not applicable

File name

Amd64_942ee4d771bbdb8c6ada4bc3365d1117_31bf3856ad364e35_6.1.7601.21700_none_34f9fdc5787b0d4d.manifest

File version

Not applicable

File size

701

Date (UTC)

08-Apr-2011

Time (UTC)

18:30

Platform

Not applicable

File name

Amd64_9434b41b18e6ef3bfda2570e5e12caef_31bf3856ad364e35_6.1.7601.17591_none_22330e74074988dc.manifest

File version

Not applicable

File size

1,042

Date (UTC)

08-Apr-2011

Time (UTC)

18:30

Platform

Not applicable

File name

Amd64_efa3c412c491288e25ee66308332c35a_31bf3856ad364e35_6.1.7601.17591_none_77827060c44aac9c.manifest

File version

Not applicable

File size

699

Date (UTC)

08-Apr-2011

Time (UTC)

18:30

Platform

Not applicable

File name

Amd64_microsoft-windows-os-kernel_31bf3856ad364e35_6.1.7601.17591_none_c9fce6d1cb06302c.manifest

File version

Not applicable

File size

15,291

Date (UTC)

08-Apr-2011

Time (UTC)

08:54

Platform

Not applicable

File name

Amd64_microsoft-windows-os-kernel_31bf3856ad364e35_6.1.7601.21700_none_cae6d484e3dbb84d.manifest

File version

Not applicable

File size

15,291

Date (UTC)

08-Apr-2011

Time (UTC)

08:04

Platform

Not applicable

File name

Update-bf.mum

File version

Not applicable

File size

2,305

Date (UTC)

08-Apr-2011

Time (UTC)

18:30

Platform

Not applicable

File name

X86_microsoft-windows-os-kernel_31bf3856ad364e35_6.1.7601.17591_none_6dde4b4e12a8bef6.manifest

File version

Not applicable

File size

16,151

Date (UTC)

08-Apr-2011

Time (UTC)

08:32

Platform

Not applicable

File name

X86_microsoft-windows-os-kernel_31bf3856ad364e35_6.1.7601.21700_none_6ec839012b7e4717.manifest

File version

Not applicable

File size

16,151

Date (UTC)

08-Apr-2011

Time (UTC)

07:24

Platform

Not applicable

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

File name

Ia64_482bbdb8694f4dcdb663cf2621a4fcc8_31bf3856ad364e35_6.1.7601.21700_none_85b6c8eeb3c2748c.manifest

File version

Not applicable

File size

699

Date (UTC)

08-Apr-2011

Time (UTC)

18:30

Platform

Not applicable

File name

Ia64_84a719080861e031c5078e329f1f34c2_31bf3856ad364e35_6.1.7601.21700_none_ca05fe32e071803b.manifest

File version

Not applicable

File size

698

Date (UTC)

08-Apr-2011

Time (UTC)

18:30

Platform

Not applicable

File name

Ia64_b4ea9e9f3f8b41494a7ad295955a0b45_31bf3856ad364e35_6.1.7601.17591_none_14d35c1fbb765c23.manifest

File version

Not applicable

File size

699

Date (UTC)

08-Apr-2011

Time (UTC)

18:30

Platform

Not applicable

File name

Ia64_efa3c412c491288e25ee66308332c35a_31bf3856ad364e35_6.1.7601.17591_none_1b6578d30beb4462.manifest

File version

Not applicable

File size

698

Date (UTC)

08-Apr-2011

Time (UTC)

18:30

Platform

Not applicable

File name

Ia64_microsoft-windows-os-kernel_31bf3856ad364e35_6.1.7601.17591_none_6ddfef4412a6c7f2.manifest

File version

Not applicable

File size

15,289

Date (UTC)

08-Apr-2011

Time (UTC)

08:54

Platform

Not applicable

File name

Ia64_microsoft-windows-os-kernel_31bf3856ad364e35_6.1.7601.21700_none_6ec9dcf72b7c5013.manifest

File version

Not applicable

File size

15,289

Date (UTC)

08-Apr-2011

Time (UTC)

07:56

Platform

Not applicable

File name

Update-bf.mum

File version

Not applicable

File size

1,425

Date (UTC)

08-Apr-2011

Time (UTC)

18:30

Platform

Not applicable

File name

X86_microsoft-windows-os-kernel_31bf3856ad364e35_6.1.7601.17591_none_6dde4b4e12a8bef6.manifest

File version

Not applicable

File size

16,151

Date (UTC)

08-Apr-2011

Time (UTC)

08:32

Platform

Not applicable

File name

X86_microsoft-windows-os-kernel_31bf3856ad364e35_6.1.7601.21700_none_6ec839012b7e4717.manifest

File version

Not applicable

File size

16,151

Date (UTC)

08-Apr-2011

Time (UTC)

07:24

Platform

Not applicable

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.

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