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The network adaptor locks up after you experience a failed attempt to log on to a wired Ethernet Network by using 802.1X authentication on a Windows XP-based computer

Support for Windows XP has ended

Microsoft ended support for Windows XP on April 8, 2014. This change has affected your software updates and security options. Learn what this means for you and how to stay protected.

Consider the following scenario:
  • You are using a Microsoft Windows XP-based computer.
  • You experience two failed attempts to log on to a wired Ethernet Network by using 802.1X authentication.
  • You successfully log on to the wired Ethernet Network by using 802.1X authentication.
  • You experience a third failed logon attempt.
In this scenario, the network adaptor locks up after the third failed logon attempt.

Note This symptom only occurs if you have not restarted the computer after the first two failed attempts to log on.
This problem occurs because the failure counter is not automatically reset after a successful logon. The network adaptor locks up after the failure counter records three failed logon attempts.

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.


To apply this hotfix, you must have Windows XP Service Pack 1 (SP1) installed on the computer.

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 tool in Control Panel.
Windows XP, 32-bit x86-based versions
File nameFile versionFile sizeDateTimePlatformSP requirementService branch

Windows XP, 64-bit Itanium-based versions
File nameFile versionFile sizeDateTimePlatformSP requirementService branch
To work around this problem, restart the computer to reset the failure counter.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about the description of the standard terminology that is used to describe Microsoft software updates, 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

Article ID: 884027 - Last Review: 10/09/2011 14:48:00 - Revision: 3.0

Microsoft Windows XP Professional

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