Symptoms

Consider the following scenario:

  • You have a Dynamic Host Configuration Protocol (DHCP) client computer that is running Windows 7 or Windows Server 2008 R2.

  • You install and then enable multiple network adapters on the computer.

  • You wake the computer from Sleep (S3) mode or from Hibernate (S4) mode.

In this scenario, the client cannot obtain a DHCP lease. Therefore, you cannot access the network.

Cause

This issue occurs because a DHCP response (ACK or NAK) is received at the client computer and can get stuck in the message queue.

When the operating system wakes from Sleep mode or from Hibernate mode, the client tries to renew the DHCP lease. If multiple network adapters are configured for DHCP address assignment on the client computer, the ACK or NAK response from the server may become stalled in the receiving queue for the DHCP client service. It is expected that the client computer immediately starts the Discover, Offer, Request, and Acknowledgement (DORA) process again and obtains a new lease. However, the client times out while it is waiting for a response from the DHCP server and is continuing to try to renew the DHCP lease.

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 7 or 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 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 very important for 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

Platform

Dhcpclientdll.ptxml

Not Applicable

5,597

13-Jul-2009

20:24

Not Applicable

Dhcpcmonitor.dll

6.1.7600.16385

11,264

14-Jul-2009

01:15

x86

Dhcpcore.dll

6.1.7600.20799

253,952

14-Sep-2010

04:33

x86

Dhcpcore6.dll

6.1.7600.16385

191,488

14-Jul-2009

01:15

x86

Dhcpcsvc.dll

6.1.7600.16385

61,952

14-Jul-2009

01:15

x86

Dhcpcsvc6.dll

6.1.7600.16385

43,008

14-Jul-2009

01:15

x86

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

File name

File version

File size

Date

Time

Platform

Dhcpclientdll.ptxml

Not Applicable

5,597

13-Jul-2009

20:19

Not Applicable

Dhcpcmonitor.dll

6.1.7600.16385

13,824

14-Jul-2009

01:40

x64

Dhcpcore.dll

6.1.7600.20799

315,392

14-Sep-2010

05:21

x64

Dhcpcore6.dll

6.1.7600.16385

224,256

14-Jul-2009

01:40

x64

Dhcpcsvc.dll

6.1.7600.16385

87,040

14-Jul-2009

01:40

x64

Dhcpcsvc6.dll

6.1.7600.16385

54,272

14-Jul-2009

01:40

x64

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

File name

File version

File size

Date

Time

Platform

Dhcpclientdll.ptxml

Not Applicable

5,597

13-Jul-2009

20:19

Not Applicable

Dhcpcmonitor.dll

6.1.7600.16385

27,136

14-Jul-2009

01:46

IA-64

Dhcpcore.dll

6.1.7600.20799

615,936

14-Sep-2010

04:12

IA-64

Dhcpcore6.dll

6.1.7600.16385

463,872

14-Jul-2009

01:46

IA-64

Dhcpcsvc.dll

6.1.7600.16385

162,304

14-Jul-2009

01:46

IA-64

Dhcpcsvc6.dll

6.1.7600.16385

86,528

14-Jul-2009

01:46

IA-64

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_3aa61360d339fa94a615713c5e600315_31bf3856ad364e35_6.1.7600.20799_none_3c4be0f2d6ee21f8.manifest

File version

Not applicable

File size

703

Date (UTC)

17-Sep-2010

Time (UTC)

11:14

Platform

Not applicable

File name

X86_microsoft-windows-dhcp-client-dll_31bf3856ad364e35_6.1.7600.20799_none_d7b3537ca9057d77.manifest

File version

Not applicable

File size

95,014

Date (UTC)

17-Sep-2010

Time (UTC)

11:37

Platform

Not applicable

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

File name

Amd64_249db11dc1aa282c1d6148116f275a1f_31bf3856ad364e35_6.1.7600.20799_none_016615aa848d7eae.manifest

File version

Not applicable

File size

707

Date (UTC)

17-Sep-2010

Time (UTC)

11:14

Platform

Not applicable

File name

Amd64_4b53614f54aafaf09cdd741be72323c6_31bf3856ad364e35_6.1.7600.20799_none_03701dc9279795aa.manifest

File version

Not applicable

File size

1,054

Date (UTC)

17-Sep-2010

Time (UTC)

11:14

Platform

Not applicable

File name

Amd64_microsoft-windows-dhcp-client-dll_31bf3856ad364e35_6.1.7600.20799_none_33d1ef006162eead.manifest

File version

Not applicable

File size

95,032

Date (UTC)

17-Sep-2010

Time (UTC)

11:41

Platform

Not applicable

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

File name

Ia64_16c087fb6e9ae8c25ecb0f6e3acaf04d_31bf3856ad364e35_6.1.7600.20799_none_63733ae059f9e684.manifest

File version

Not applicable

File size

1,052

Date (UTC)

17-Sep-2010

Time (UTC)

11:14

Platform

Not applicable

File name

Ia64_microsoft-windows-dhcp-client-dll_31bf3856ad364e35_6.1.7600.20799_none_d7b4f772a9038673.manifest

File version

Not applicable

File size

95,023

Date (UTC)

17-Sep-2010

Time (UTC)

11:14

Platform

Not applicable

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