Startup takes about 13 seconds longer than usual on a UEFI-based computer that has Windows 7 or Windows Server 2008 R2 installed

Symptoms

On a Unified Extensible Firmware Interface (UEFI)-based computer that has Windows 7 or Windows Server 2008 R2 installed, Windows takes about 13 seconds longer than usual to start.

Cause

This issue occurs because of an error in Ntoskrnl.exe and in Ntkrnlpa.exe. This causes Windows to take longer than usual to initialize phase 0 of the memory manager.

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

No prerequisites are required.

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 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 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

6.1.7600.16585

5,509,504

01-May-2010

19:22

x64

Ntoskrnl.exe

6.1.7600.20704

5,478,272

01-May-2010

21:20

x64

Ntkrnlpa.exe

6.1.7600.16585

3,955,080

01-May-2010

18:34

Not applicable

Ntoskrnl.exe

6.1.7600.16585

3,899,776

01-May-2010

18:34

Not applicable

Ntkrnlpa.exe

6.1.7600.20704

3,964,808

01-May-2010

20:38

Not applicable

Ntoskrnl.exe

6.1.7600.20704

3,909,000

01-May-2010

20:38

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

6.1.7600.16585

11,174,272

01-May-2010

17:55

IA-64

Ntoskrnl.exe

6.1.7600.20704

11,106,688

01-May-2010

20:22

IA-64

Ntkrnlpa.exe

6.1.7600.16585

3,955,080

01-May-2010

18:34

Not applicable

Ntoskrnl.exe

6.1.7600.16585

3,899,776

01-May-2010

18:34

Not applicable

Ntkrnlpa.exe

6.1.7600.20704

3,964,808

01-May-2010

20:38

Not applicable

Ntoskrnl.exe

6.1.7600.20704

3,909,000

01-May-2010

20:38

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

For more information about Windows support for UEFI, visit the following Microsoft website:

General information about Windows support for UEFIFor 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_500b57df2bf95e3cb888633a4c2884db_31bf3856ad364e35_6.1.7600.20704_none_4ade4352bc56a8b8.manifest

File version

Not applicable

File size

701

Date (UTC)

03-May-2010

Time (UTC)

14:47

Platform

Not applicable

File name

Amd64_5d797ec801e350536690c56edb09184d_31bf3856ad364e35_6.1.7600.20704_none_6d8697d65ef01e88.manifest

File version

Not applicable

File size

699

Date (UTC)

03-May-2010

Time (UTC)

14:47

Platform

Not applicable

File name

Amd64_7b394f742e97584b4d2e7d19173eb8f3_31bf3856ad364e35_6.1.7600.16585_none_1dcfde01642caea3.manifest

File version

Not applicable

File size

701

Date (UTC)

03-May-2010

Time (UTC)

14:47

Platform

Not applicable

File name

Amd64_f06460cb1e50589880e279fc6889b586_31bf3856ad364e35_6.1.7600.16585_none_73d8db59a83f1b14.manifest

File version

Not applicable

File size

699

Date (UTC)

03-May-2010

Time (UTC)

14:47

Platform

Not applicable

File name

Amd64_microsoft-windows-os-kernel_31bf3856ad364e35_6.1.7600.16585_none_c8255713cdd4135d.manifest

File version

Not applicable

File size

15,291

Date (UTC)

01-May-2010

Time (UTC)

20:37

Platform

Not applicable

File name

Amd64_microsoft-windows-os-kernel_31bf3856ad364e35_6.1.7600.20704_none_c90474dae6b1b76f.manifest

File version

Not applicable

File size

15,291

Date (UTC)

01-May-2010

Time (UTC)

22:19

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

1,907

Date (UTC)

03-May-2010

Time (UTC)

14:47

Platform

Not applicable

File name

X86_microsoft-windows-os-kernel_31bf3856ad364e35_6.1.7600.16585_none_6c06bb901576a227.manifest

File version

Not applicable

File size

16,151

Date (UTC)

01-May-2010

Time (UTC)

19:14

Platform

Not applicable

File name

X86_microsoft-windows-os-kernel_31bf3856ad364e35_6.1.7600.20704_none_6ce5d9572e544639.manifest

File version

Not applicable

File size

16,151

Date (UTC)

01-May-2010

Time (UTC)

21:18

Platform

Not applicable

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

File name

Ia64_5d797ec801e350536690c56edb09184d_31bf3856ad364e35_6.1.7600.20704_none_1169a048a690b64e.manifest

File version

Not applicable

File size

698

Date (UTC)

03-May-2010

Time (UTC)

14:46

Platform

Not applicable

File name

Ia64_846ef0a165f0ef3bb69827b0b6a2ad96_31bf3856ad364e35_6.1.7600.20704_none_d1fa9e3646736f31.manifest

File version

Not applicable

File size

699

Date (UTC)

03-May-2010

Time (UTC)

14:46

Platform

Not applicable

File name

Ia64_a3df02ff560f485c23c1ebcd4f699adb_31bf3856ad364e35_6.1.7600.16585_none_ea85a8ce39ce39d7.manifest

File version

Not applicable

File size

699

Date (UTC)

03-May-2010

Time (UTC)

14:46

Platform

Not applicable

File name

Ia64_f06460cb1e50589880e279fc6889b586_31bf3856ad364e35_6.1.7600.16585_none_17bbe3cbefdfb2da.manifest

File version

Not applicable

File size

698

Date (UTC)

03-May-2010

Time (UTC)

14:46

Platform

Not applicable

File name

Ia64_microsoft-windows-os-kernel_31bf3856ad364e35_6.1.7600.16585_none_6c085f861574ab23.manifest

File version

Not applicable

File size

15,289

Date (UTC)

01-May-2010

Time (UTC)

20:32

Platform

Not applicable

File name

Ia64_microsoft-windows-os-kernel_31bf3856ad364e35_6.1.7600.20704_none_6ce77d4d2e524f35.manifest

File version

Not applicable

File size

15,289

Date (UTC)

01-May-2010

Time (UTC)

22:06

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

1,684

Date (UTC)

03-May-2010

Time (UTC)

14:46

Platform

Not applicable

File name

X86_microsoft-windows-os-kernel_31bf3856ad364e35_6.1.7600.16585_none_6c06bb901576a227.manifest

File version

Not applicable

File size

16,151

Date (UTC)

01-May-2010

Time (UTC)

19:14

Platform

Not applicable

File name

X86_microsoft-windows-os-kernel_31bf3856ad364e35_6.1.7600.20704_none_6ce5d9572e544639.manifest

File version

Not applicable

File size

16,151

Date (UTC)

01-May-2010

Time (UTC)

21:18

Platform

Not applicable

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