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Symptoms

Consider the following scenario:

  • You run an active antivirus application on a computer that is running Windows 7.

  • You install Windows 7 Service Pack 1 (SP1) on the computer.

  • You restart the computer.

In this scenario, you may receive a Stop error message that resembles the following:

STOP: 0x0000007F (0x0000008, parameter2, parameter3, parameter4)
UNEXPECTED_KERNEL_MODE_TRAP

Notes

  • The parameters that are after the "0x0000008" parameter in this Stop error message vary, depending on the configuration of the computer.

  • Not all "0x0000007F" Stop errors are caused by this issue.

Cause

This issue occurs because both the operating system and the antivirus application read from the same files in the startup process of the operating system. Therefore, kernel stack memory may be exhausted, and you receive the Stop error message that is mentioned in the "Symptoms" section.

Note After you install an update that updates certain system files on the computer, the operating system tries to verify the digital signatures on all new files.

More Information

Update information

To resolve this issue, you must install this update before you install Windows 7 Service Pack 1 (SP1).

If you have installed Windows 7 SP1, uninstall Windows 7 SP1, and then apply this update. For more information about how to uninstall Windows 7 SP1, visit the following Microsoft website:

http://windows.microsoft.com/uninstallwindows7sp1

How to obtain this update

This update is available from the Microsoft Update website:

http://update.microsoft.com

Prerequisites

To apply this update, you must be running Windows 7.


Registry information

To use the update 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 update.

Update replacement information

This update does not replace a previously released update.

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 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

    RTM

    GDR

    6.1.760
    0.20xxx

    Windows 7

    RTM

    LDR

    6.1.760
    1.17xxx

    Windows 7

    SP1

    GDR

    6.1.760
    1.21xxx

    Windows 7

    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 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

Cdd.dll

6.1.7600.16699

107,520

02-Nov-2010

04:23

x86

Dxgkrnl.sys

6.1.7600.16699

728,448

02-Nov-2010

04:46

x86

Dxgmms1.sys

6.1.7600.16748

219,008

26-Jan-2011

06:11

x86

Lddmcore.ptxml

Not applicable

1,151

01-Nov-2010

23:04

Not applicable

Cdd.dll

6.1.7600.20888

107,520

26-Jan-2011

05:44

x86

Dxgkrnl.sys

6.1.7600.20888

728,448

26-Jan-2011

06:01

x86

Dxgmms1.sys

6.1.7600.20888

219,008

26-Jan-2011

06:01

x86

Lddmcore.ptxml

Not applicable

1,151

13-Jul-2009

20:32

Not applicable

Cdd.dll

6.1.7601.17514

107,520

20-Nov-2010

11:56

x86

Dxgkrnl.sys

6.1.7601.17514

728,448

20-Nov-2010

12:29

x86

Dxgmms1.sys

6.1.7601.17550

219,008

26-Jan-2011

06:13

x86

Lddmcore.ptxml

Not applicable

1,151

13-Jul-2009

20:32

Not applicable

Cdd.dll

6.1.7601.17514

107,520

20-Nov-2010

11:56

x86

Dxgkrnl.sys

6.1.7601.21649

728,448

26-Jan-2011

05:59

x86

Dxgmms1.sys

6.1.7601.21649

219,008

26-Jan-2011

05:59

x86

Lddmcore.ptxml

Not applicable

1,151

13-Jul-2009

20:32

Not applicable

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 for Windows 7

Additional files for all supported x86-based versions of Windows 7

File name

Update.mum

File version

Not applicable

File size

2,301

Date (UTC)

27-Jan-2011

Time (UTC)

04:10

Platform

Not applicable

File name

X86_212d89d3bdcc35a7072bed4a9ac853f4_31bf3856ad364e35_6.1.7600.20888_none_9e9a2e68d3a02ec8.manifest

File version

Not applicable

File size

696

Date (UTC)

27-Jan-2011

Time (UTC)

04:10

Platform

Not applicable

File name

X86_9fb38cab40768a065387e4b1808f8e44_31bf3856ad364e35_6.1.7600.16748_none_50b15ab988a1169b.manifest

File version

Not applicable

File size

696

Date (UTC)

27-Jan-2011

Time (UTC)

04:10

Platform

Not applicable

File name

X86_a82e0eb1064b7ad92694b33d35d9fc34_31bf3856ad364e35_6.1.7601.17550_none_f43cf713b19b810d.manifest

File version

Not applicable

File size

696

Date (UTC)

27-Jan-2011

Time (UTC)

04:10

Platform

Not applicable

File name

X86_e62267b1a90d9eef564c393f92444a29_31bf3856ad364e35_6.1.7601.21649_none_e8d80f23d988e1ea.manifest

File version

Not applicable

File size

696

Date (UTC)

27-Jan-2011

Time (UTC)

04:10

Platform

Not applicable

File name

X86_microsoft-windows-lddmcore_31bf3856ad364e35_6.1.7600.16748_none_abcd36e844bd2bca.manifest

File version

Not applicable

File size

13,305

Date (UTC)

27-Jan-2011

Time (UTC)

04:14

Platform

Not applicable

File name

X86_microsoft-windows-lddmcore_31bf3856ad364e35_6.1.7600.20888_none_ac2b94035dfb3b58.manifest

File version

Not applicable

File size

13,193

Date (UTC)

26-Jan-2011

Time (UTC)

06:20

Platform

Not applicable

File name

X86_microsoft-windows-lddmcore_31bf3856ad364e35_6.1.7601.17550_none_ada0c1b241f2e8ef.manifest

File version

Not applicable

File size

13,305

Date (UTC)

27-Jan-2011

Time (UTC)

04:14

Platform

Not applicable

File name

X86_microsoft-windows-lddmcore_31bf3856ad364e35_6.1.7601.21649_none_ae3e31035b0050d7.manifest

File version

Not applicable

File size

13,305

Date (UTC)

27-Jan-2011

Time (UTC)

04:14

Platform

Not applicable

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