DetailPage-MSS-KB

Microsoft small business knowledge base

Article ID: 2763523 - Last Review: November 13, 2012 - Revision: 1.0

On This Page

Symptoms

Consider the following scenario:
  • You use a DHCP unique identifier (DUID) as a unique identifier in a network environment. 
  • You use DUID and cable modem identifier mapping in the network. 
  • You have client computers that are running Windows 7 or Windows Server 2008 R2 in the network environment.
  • One of the client computers sends a DHCPv6 message from a cable modem.
  • Another client computer sends a DHCPv6 message that has the same DUID from a different cable modem.
  • The record for the new DUID and cable modem mapping overwrites the previous record.
In this scenario, the client computers have no network connectivity.

Notes
  • When you run the sysprep command without the /generalize option or you use a different ghost imaging software to build the operating system, the duplicate DUID issue occurs.
  • When you run the sysprep command together with the /generalize option, a DHCP client API is called to clear the value of the DUID.
  • The DUID of a DHCPv6 message is generated the first time that the DHCP client service starts. The value of the DUID is stored in the Dhcpv6DUID registry entry. If you delete the value of the registry entry, the value is recreated when an interface is enabled or connected on the client computer. The Dhcpv6DUID registry entry is located under the following registry subkey:
    \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\TCPIP6\Parameters

Resolution

Update information

How to obtain this update

Microsoft Update
This update is available from the following Microsoft Update website:
http://update.microsoft.com (http://update.microsoft.com)
Microsoft Download Center
The following files are available for download from the Microsoft Download Center:
Collapse this tableExpand this table
Operating systemUpdate
All supported x86-based versions of Windows 7
Collapse this imageExpand this image
Download
Download the update package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=26d4efef-b689-4727-bc6c-86c205a58a3e)
All supported x64-based versions of Windows 7
Collapse this imageExpand this image
Download
Download the update package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=cc3a4e03-ba42-494b-9c7b-bfae7f265269)
All supported x64-based versions of Windows Server 2008 R2
Collapse this imageExpand this image
Download
Download the update package now. ( http://www.microsoft.com/downloads/details.aspx?FamilyId=7b19878a-62fa-4ff7-a9fb-58563db351ac)
All supported IA-64-based versions of Windows Server 2008 R2
Collapse this imageExpand this image
Download
Download the update package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=7add4be6-b358-4a45-ad2e-1338b42071b8)
For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591  (http://support.microsoft.com/kb/119591/ ) How to obtain Microsoft support files from online services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Prerequisites

To apply this update, you must be running one of the following operating systems:
  • Windows 7
  • Windows 7 Service Pack 1 (SP1)
  • Windows Server 2008 R2
  • 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  (http://support.microsoft.com/kb/976932/ ) Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2

Registry information

To apply this update, 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 update 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 updates and Windows Server 2008 R2 updates are included in the same packages. However, updates on the Update Request page are listed under both operating systems. To request the update package that applies to one or both operating systems, select the update 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 update 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:
    Collapse this tableExpand this table
    VersionProductMilestoneService branch
    6.1.760 0.16xxxWindows 7 and Windows Server 2008 R2RTMGDR
    6.1.760 1.17xxxWindows 7 and Windows Server 2008 R2SP1GDR
    6.1.760 1.22xxxWindows 7 and Windows Server 2008 R2SP1LDR
  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain updates 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 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 7
Collapse this imageExpand this image
Collapse this tableExpand this table
File nameFile versionFile sizeDateTime
Dhcpcmonitor.dll.mui6.1.7600.163854,09614-Jul-200901:03
Dhcpcore.dll.mui6.1.7601.1751420,99220-Nov-201012:09
Dhcpcore6.dll.mui6.1.7601.1797017,92009-Oct-201217:31
Dhcpcsvc.dll.mui6.1.7600.163852,56014-Jul-200901:02
Dhcpcsvc6.dll.mui6.1.7601.1797017,92009-Oct-201217:54
Dhcpcmonitor.dll.mui6.1.7600.163854,09614-Jul-200901:03
Dhcpcore.dll.mui6.1.7601.1751420,99220-Nov-201012:09
Dhcpcore6.dll.mui6.1.7601.2213017,92009-Oct-201217:21
Dhcpcsvc.dll.mui6.1.7600.163852,56014-Jul-200901:02
Dhcpcsvc6.dll.mui6.1.7601.2213017,92009-Oct-201217:32
Dhcpclientdll.ptxmlNot applicable5,59713-Jul-200920:24
Dhcpcmonitor.dll6.1.7600.1638511,26414-Jul-200901:15
Dhcpcore.dll6.1.7601.17514254,46420-Nov-201012:18
Dhcpcore6.dll6.1.7601.17970193,53609-Oct-201217:40
Dhcpcsvc.dll6.1.7600.1638561,95214-Jul-200901:15
Dhcpcsvc6.dll6.1.7601.1797044,03209-Oct-201217:40
Dhcpclientdll.ptxmlNot applicable5,59713-Jul-200920:24
Dhcpcmonitor.dll6.1.7600.1638511,26414-Jul-200901:15
Dhcpcore.dll6.1.7601.22130257,02409-Oct-201217:29
Dhcpcore6.dll6.1.7601.22130195,07209-Oct-201217:29
Dhcpcsvc.dll6.1.7600.1638561,95214-Jul-200901:15
Dhcpcsvc6.dll6.1.7601.2213044,03209-Oct-201217:29
Collapse this imageExpand this image
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
Collapse this imageExpand this image
Collapse this tableExpand this table
File nameFile versionFile sizeDateTime
Dhcpcmonitor.dll.mui6.1.7600.163854,09614-Jul-200901:30
Dhcpcore.dll.mui6.1.7601.1751420,99220-Nov-201012:55
Dhcpcore6.dll.mui6.1.7601.1797017,92009-Oct-201218:18
Dhcpcsvc.dll.mui6.1.7600.163852,56014-Jul-200901:28
Dhcpcsvc6.dll.mui6.1.7601.1797017,92009-Oct-201218:18
Dhcpcmonitor.dll.mui6.1.7600.163854,09614-Jul-200901:30
Dhcpcore.dll.mui6.1.7601.1751420,99220-Nov-201012:55
Dhcpcore6.dll.mui6.1.7601.2213017,92009-Oct-201218:18
Dhcpcsvc.dll.mui6.1.7600.163852,56014-Jul-200901:28
Dhcpcsvc6.dll.mui6.1.7601.2213017,92009-Oct-201218:29
Dhcpclientdll.ptxmlNot applicable5,59713-Jul-200920:19
Dhcpcmonitor.dll6.1.7600.1638513,82414-Jul-200901:40
Dhcpcore.dll6.1.7601.17514317,95220-Nov-201013:26
Dhcpcore6.dll6.1.7601.17970226,81609-Oct-201218:17
Dhcpcsvc.dll6.1.7600.1638587,04014-Jul-200901:40
Dhcpcsvc6.dll6.1.7601.1797055,29609-Oct-201218:17
Dhcpclientdll.ptxmlNot applicable5,59713-Jul-200920:19
Dhcpcmonitor.dll6.1.7600.1638513,82414-Jul-200901:40
Dhcpcore.dll6.1.7601.22130318,97609-Oct-201218:29
Dhcpcore6.dll6.1.7601.22130226,81609-Oct-201218:29
Dhcpcsvc.dll6.1.7600.1638587,04014-Jul-200901:40
Dhcpcsvc6.dll6.1.7601.2213055,29609-Oct-201218:29
Collapse this imageExpand this image
For all supported IA-64-based versions of Windows Server 2008 R2
Collapse this imageExpand this image
Collapse this tableExpand this table
File nameFile versionFile sizeDateTime
Dhcpcmonitor.dll.mui6.1.7600.163854,09614-Jul-200901:39
Dhcpcore.dll.mui6.1.7601.1751420,99220-Nov-201010:14
Dhcpcore6.dll.mui6.1.7601.1797017,92009-Oct-201216:58
Dhcpcsvc.dll.mui6.1.7600.163852,56014-Jul-200901:33
Dhcpcsvc6.dll.mui6.1.7601.1797017,92009-Oct-201217:07
Dhcpclientdll.ptxmlNot applicable5,59713-Jul-200920:19
Dhcpcmonitor.dll6.1.7600.1638527,13614-Jul-200901:46
Dhcpcore.dll6.1.7601.17514617,98420-Nov-201010:25
Dhcpcore6.dll6.1.7601.17970466,94409-Oct-201217:00
Dhcpcsvc.dll6.1.7600.16385162,30414-Jul-200901:46
Dhcpcsvc6.dll6.1.7601.1797087,55209-Oct-201217:00
Dhcpclientdll.ptxmlNot applicable5,59713-Jul-200920:19
Dhcpcmonitor.dll6.1.7600.1638527,13614-Jul-200901:46
Dhcpcore.dll6.1.7601.22130621,05609-Oct-201217:23
Dhcpcore6.dll6.1.7601.22130466,43209-Oct-201217:23
Dhcpcsvc.dll6.1.7600.16385162,30414-Jul-200901:46
Dhcpcsvc6.dll6.1.7601.2213087,55209-Oct-201217:23
Collapse this imageExpand this image


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  (http://support.microsoft.com/kb/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
Collapse this imageExpand this image
Collapse this tableExpand this table
File nameX86_microsoft-windows-d..lient-dll.resources_31bf3856ad364e35_6.1.7601.17970_en-us_57a9912a1886b664.manifest
File versionNot applicable
File size4,822
Date (UTC)10-Oct-2012
Time (UTC)16:42
File nameX86_microsoft-windows-d..lient-dll.resources_31bf3856ad364e35_6.1.7601.22130_en-us_585e45c7318419ac.manifest
File versionNot applicable
File size4,822
Date (UTC)10-Oct-2012
Time (UTC)16:42
File nameX86_microsoft-windows-dhcp-client-dll_31bf3856ad364e35_6.1.7601.17970_none_d91cba738d061f6b.manifest
File versionNot applicable
File size95,014
Date (UTC)10-Oct-2012
Time (UTC)16:42
File nameX86_microsoft-windows-dhcp-client-dll_31bf3856ad364e35_6.1.7601.22130_none_d9d16f10a60382b3.manifest
File versionNot applicable
File size95,014
Date (UTC)10-Oct-2012
Time (UTC)16:42
Collapse this imageExpand this image
Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
Collapse this imageExpand this image
Collapse this tableExpand this table
File nameAmd64_microsoft-windows-d..lient-dll.resources_31bf3856ad364e35_6.1.7601.17970_en-us_b3c82cadd0e4279a.manifest
File versionNot applicable
File size4,824
Date (UTC)10-Oct-2012
Time (UTC)16:48
File nameAmd64_microsoft-windows-d..lient-dll.resources_31bf3856ad364e35_6.1.7601.22130_en-us_b47ce14ae9e18ae2.manifest
File versionNot applicable
File size4,824
Date (UTC)10-Oct-2012
Time (UTC)16:48
File nameAmd64_microsoft-windows-dhcp-client-dll_31bf3856ad364e35_6.1.7601.17970_none_353b55f7456390a1.manifest
File versionNot applicable
File size95,032
Date (UTC)10-Oct-2012
Time (UTC)16:48
File nameAmd64_microsoft-windows-dhcp-client-dll_31bf3856ad364e35_6.1.7601.22130_none_35f00a945e60f3e9.manifest
File versionNot applicable
File size95,032
Date (UTC)10-Oct-2012
Time (UTC)16:48
Collapse this imageExpand this image
Additional files for all supported IA-64-based versions of Windows Server 2008 R2
Collapse this imageExpand this image
Collapse this tableExpand this table
File nameIa64_microsoft-windows-d..lient-dll.resources_31bf3856ad364e35_6.1.7601.17970_en-us_57ab35201884bf60.manifest
File versionNot applicable
File size4,823
Date (UTC)10-Oct-2012
Time (UTC)15:54
File nameIa64_microsoft-windows-dhcp-client-dll_31bf3856ad364e35_6.1.7601.17970_none_d91e5e698d042867.manifest
File versionNot applicable
File size95,023
Date (UTC)10-Oct-2012
Time (UTC)15:54
File nameIa64_microsoft-windows-dhcp-client-dll_31bf3856ad364e35_6.1.7601.22130_none_d9d31306a6018baf.manifest
File versionNot applicable
File size95,023
Date (UTC)10-Oct-2012
Time (UTC)15:54
Collapse this imageExpand this image

Applies to
  • Windows Server 2008 R2 Enterprise
  • Windows Server 2008 R2 Datacenter
  • Windows Server 2008 R2 for Itanium-Based Systems
  • Windows Server 2008 R2 Foundation
  • Windows Server 2008 R2 Standard
  • Windows Web Server 2008 R2
  • Windows 7 Enterprise
  • Windows 7 Home Basic
  • Windows 7 Home Premium
  • Windows 7 Professional
  • Windows 7 Starter
  • Windows 7 Ultimate
Keywords: 
kbfix kbsurveynew kbexpertiseadvanced atdownload KB2763523
Share
Additional support options
Ask The Microsoft Small Business Support Community
Contact Microsoft Small Business Support
Find Microsoft Small Business Support Certified Partner
Find a Microsoft Store For In-Person Small Business Support