Microsoft KB Archive/821256

= The 802.1X PEAP Authentication Method Is Overridden When You Install the Cisco Client Utility with the Aironet Adapter =

Article ID: 821256

Article Last Modified on 10/30/2006

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APPLIES TO


 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Professional Edition
 * Microsoft Windows 2000 Service Pack 4

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SYMPTOMS
After you install a Cisco Aironet wireless network adapter and then start the Wireless Configuration service, you may experience all of the following symptoms:
 * When you open the properties dialog box for the network adapter and then click the Authentication tab, PEAP appears in the EAP type list. You expect the Protected EAP (PEAP) component that was installed with Windows 2000 Service Pack 4 (SP4) to appear in this list.
 * When you click Properties to view the properties of the PEAP item, all subsequent dialog boxes are different from what you expect.
 * If you remove either the Cisco Aironet Client utility or PEAP by using the Cisco installer program, the wireless network adapter properties are not returned to their listed states from before you installed the Cisco items.



CAUSE
This issue occurs when both of the following conditions are true:
 * You install the Cisco Aironet Client utility on a Windows 2000 SP4-based computer.

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 * When you install the Cisco Aironet Client utility, the PEAP option is selected.

This Cisco utility must be installed when you install the Cisco Aironet wireless network adapter on a Windows 2000-based computer. This permits you to select the wireless network to connect to. However, when you install the Cisco client utility with the PEAP option selected, it makes changes to the Windows 2000 SP4 user interface, as described in the &quot;Symptoms&quot; section of this article. These changes override the Windows 2000 SP4 802.1X PEAP authentication method.



RESOLUTION
To resolve this issue, contact Cisco to obtain an updated version of the Aironet Client utility.

For information about how to contact Cisco, click the appropriate article number in the following list to view the article in the Microsoft Knowledge Base:

65416 Hardware and Software Third-Party Vendor Contact List, A-K

60781 Hardware and Software Third-Party Vendor Contact List, L-P

60782 Hardware and Software Third-Party Vendor Contact List, Q-Z

Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information. The third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.



WORKAROUND
To work around this issue, reinstall SP4 for Windows 2000.



MORE INFORMATION
For additional information about how to obtain the latest Windows 2000 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

260910 How to Obtain the Latest Windows 2000 Service Pack

Keywords: kbbug kbwin2ksp4fix KB821256

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