Microsoft KB Archive/932063

= Several problems occur on a Windows Vista-based computer when you work in a wireless network environment =

Article ID: 932063

Article Last Modified on 11/12/2007

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APPLIES TO


 * Windows Vista Enterprise 64-bit Edition
 * Windows Vista Home Premium 64-bit Edition
 * Windows Vista Ultimate 64-bit Edition
 * Windows Vista Business
 * Windows Vista Business 64-bit Edition
 * Windows Vista Enterprise
 * Windows Vista Home Premium
 * Windows Vista Ultimate

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SYMPTOMS
On a Microsoft Windows Vista-based computer, you may experience one or more of the following symptoms in a wireless network environment.

Symptom 1
IEEE 802.1X authentication that is based on Virtual Local Area Network (VLAN) switching may fail.

For example, you try to use computer authentication and user authentication to switch the client computer to different VLANs. However, the client computer does not obtain the correct IP address during VLAN switching.

Symptom 2
In a wireless profile, the information about the Extensible Authentication Protocol (EAP) method that is selected in a user interface may be incorrect.

For example, if different vendors provide more than one EAP method, the EAP method that is displayed in a wireless profile is not the EAP method that is actually selected.

Symptom 3
A wireless profile that an independent hardware vendor (IHV) provides may be corrupted after you use the wireless profile user interface to edit the profile. When this problem occurs, you may receive an error message that Windows Explorer has crashed.

Symptom 4
Every time that you roam to a different wireless access point, you are prompted to provide a user credential. This problem occurs even if you have saved the user credential.

Symptom 5
You registered a Protected Extensible Authentication Protocol (PEAP) method that the IHV provided. When you try to authenticate against an Internet Authentication Service (IAS) server, the server may reject the authentication, and the IAS server may send an error message that the authentication has failed. The Onex.dll file crashes when this problem occurs.



Hotfix information
A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites
No prerequisites are required.

Restart requirement
You have to restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other previously released hotfixes.

Registry information
To use one of the hotfixes in this package, you do not have to make any changes to the registry.

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 Vista, 64-bit versions


STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For more information about how to connect a Windows Vista-based computer to wireless networks, visit the following Microsoft Web site:

http://technet.microsoft.com/en-us/library/bb878035.aspx

For more information about IEEE 802.1X authentication, visit the following Microsoft Web site:

http://msdn2.microsoft.com/en-us/library/aa915922.aspx

For more information about how to troubleshoot Windows Vista 802.11 wireless connections, visit the following Microsoft Web site:

http://technet2.microsoft.com/WindowsVista/en/library/3ed3d027-5ae8-4cb0-ade5-0a7c446cd4f71033.mspx?mfr=true

For more information about EAP methods, visit the following Microsoft Web site:

http://msdn2.microsoft.com/en-us/library/aa363937.aspx

For more information about how to install an EAP method, visit the following Microsoft Web site:

http://msdn2.microsoft.com/en-us/library/aa363962.aspx

For more information about wireless networks, visit the following Microsoft Web site:

http://technet.microsoft.com/en-us/network/bb530679.aspx

For more information, 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

Keywords: kbqfe kbpubtypekc kbexpertiseadvanced kbhotfixserver KB932063

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