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Consider the following scenario:

  • You create a task sequence on a Microsoft System Center Configuration Manager 2007 Service Pack 2 (SP2) site server. The task sequence deploys an operating system image to a client.

  • You configure a Dynamic Host Configuration Protocol (DHCP) server on the same network to use DHCP option 43.

    Note DHCP option 43 is required for Microsoft vendor-specific options. By using DHCP option 43, a client can select which environment to start.

  • You select a ConfigMgr server from the boot server list in the menu of the Pre-Boot Execution Environment (PXE) startup.

In this scenario, you do not obtain the boot image. Additionally, you receive the following error message:

PXE-E78: Could not locate boot server.


The following hotfix package resolves this issue on site servers. To resolve this issue, you have to run the hotfix package on the primary site servers and on the secondary site servers.

Note The following hotfix package can be installed on a System Center Configuration Manager 2007 SP2 site server that is running an x86-based or x64-based version of an operating system.

For more information about how to install a hotfix for System Center Configuration Manager 2007, click the following article number to view the article in the Microsoft Knowledge Base:

2477182  System Center Configuration Manager 2007 hotfix installation guidance  

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 this specific problem.

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, submit a request to 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: 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.


To apply this hotfix, you must have System Center Configuration Manager 2007 SP2 installed.

Restart requirement

You do not have to restart the computer after you apply this hotfix.

Note You have to close the ConfigMgr admin console before you install this hotfix package.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The English (United States) 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.

System Center Configuration Manager 2007 file information notes

File name

File version

File size





Not applicable




Not applicable














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

For more information about Request for Comments (RFC) 2132, visit the following website:

General information about RFC 2132For more information a similar issue, click the following article number to view the article in the Microsoft Knowledge Base:

979720 Error message when Windows Deployment Service clients cannot obtain the boot image from a Windows Server 2008 R2-based WDS server: "PXE-E78: Could not locate boot server" Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.

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