Automatic updates may not be successfully downloaded from a computer that is running Software Update Services

When a client computer tries to download automatic updates across a slow network connection from a computer that is running Microsoft Software Update Services (SUS), the automatic updates may not successfully download.

Additionally, you may receive the following error message in the Windows Update log on the client computer:

This problem may occur if the client computer resets the connection to the server before the server has sent all the data to the client during automatic update detection.

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 Web site: Note 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

Software Update Services Service Pack 1

Restart requirement

You may have to restart the computer after you install this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel. To install this hotfix, type the following command at a command prompt, and then press ENTER:

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

When the fix is installed on an SUS server, the clients receive the updates when they connect to the SUS server. This is known as self update and uses the Winhttp.dll file. This process does not involve the 30-second timeout limitation. When the server is updated, the clients will replace existing binaries on their computers with the new binaries, including the new Iuengine.dll (fixed binary). Iuengine.dll no longer has the 30-second timeout limitation. This binary, Iuengine.dll, is used for Microsoft Windows 2000, Windows XP, and Windows Server 2003, so if the SUS server is patched, all clients should be updated with Iuengine.dll version 5.4.3790.21. The fix is also included in Windows XP Service Pack 2.

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