Error message that you receive on a computer that is running Windows Server 2003 SP1: "The event log file is corrupt"

After you install Windows Server 2003 Service Pack 1 (SP1), you may receive the following error message when you try to open System log:Note You can still view the System log remotely from a Windows Server 2003 computer that is earlier than Windows Server 2003 SP1. If you clear the log and restart the computer, the log may become corrupted again in the future.

This problem occurs because certain network adapter drivers do not set the customer bit correctly. When network adapter drivers try to log their own events, corruption may occur in the System log.

Service pack information

To resolve this problem, obtain the latest service pack for Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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. 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: 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

There are no prerequisites.

Restart requirement

You must restart the computer after you apply 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 file attributes) 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 item in Control Panel.

Windows Server 2003 SP1, 32-bit versions

Windows Server 2003 SP1, 64-bit versions

Windows Server 2003 SP1, itanium-based versions

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

This hotfix adds a validation code to the Eventlog.dll file. This code keeps the System log from becoming corrupted.

For information about how to set the customer bit, visit the following Microsoft Developer Network (MSDN) Web site:For more information, click the following article number to view the article in the Microsoft Knowledge Base: