When you try to use a third-party application that uses the Extensible Authentication Protocol (EAP) in Microsoft Windows XP, EAP reauthentication may not occur when it is required. Additionally, the Wireless Zero Configuration service in Windows XP may not work correctly. This problem may continue to occur after you restart the Wireless Zero Configuration service.

Note This problem may occur when you use Windows XP or Windows XP with Service Pack 2.

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This problem occurs because the third-party application is configured to wait approximately 45 seconds before EAP reauthentication occurs. When the application is configured in this manner, EAP reauthentication may stop occurring after a random period of time. Additionally, the Wireless Zero Configuration service may not display any message for you to approve a reauthentication process.

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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

There are no prerequisites for installing this hotfix.

Restart requirement

You must restart your computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

Hotfix 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.

File name	File version	File size	Date	Time	Platform
Ndisuio.sys	5.1.2600.2979	14,592	22-Aug-2006	08:53	x86	SP2	SP2QFE
Netshell.dll	5.1.2600.2979	1,705,472	22-Aug-2006	12:32	x86	SP2	SP2QFE
Wzcdlg.dll	5.1.2600.2979	383,488	22-Aug-2006	12:32	x86	SP2	SP2QFE
Wzcsapi.dll	5.1.2600.2979	52,736	22-Aug-2006	12:32	x86	SP2	SP2QFE
Wzcsvc.dll	5.1.2600.2979	476,160	22-Aug-2006	12:32	x86	SP2	SP2QFE
Xpsp3res.dll	5.1.2600.2979	210,944	22-Aug-2006	08:45	x86	SP2	SP2QFE
Updspapi.dll	6.2.29.0	371,424	12-Oct-2005	23:12	x86	None	Not Applicable

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

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For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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