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You receive a Stop error when network traffic is initiated and a filter driver is loaded

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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.

This article has been archived. It is offered "as is" and will no longer be updated.
You may receive a "0x000000c1" or a "0x000000c2" Stop error message when network traffic isinitiated and a filter driver is loaded. For example, this error may occur when you are using firewall software or virtual private network (VPN) software in the following situations:
  • You connect a wireless network adapter by using 802.1X authentication, and your firewall is using a filter driver.
  • You try to use Microsoft NetMeeting over a VPN connection.

Service pack information

To resolve this problem, obtain the latest service pack for Microsoft Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
322389 How to obtain the latest Windows XP service pack

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.

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.
   Date         Time   Version         Size    File name    Platform   -----------------------------------------------------------------   28-Oct-2003  17:26  5.1.2600.1314   12,416  Ndisuio.sys  x86   28-Oct-2003  17:26  5.1.2600.1314   40,960  Ndisuio.sys  IA-64   28-Oct-2003  17:27  5.1.2600.1314   66,048  Psched.sys   x86   28-Oct-2003  17:27  5.1.2600.1314  252,544  Psched.sys   IA-64
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Microsoft Windows XP Service Pack 2.
More information
For additional information about the terminology that is used in this article, 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 Product Updates, Tools, and Add-ons

Article ID: 831385 - Last Review: 01/12/2015 22:48:00 - Revision: 3.0

Microsoft Windows XP Professional, Microsoft Windows XP Home Edition

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