Microsoft KB Archive/902934

= You cannot find options under &quot;Use Extensible Authentication Protocol (EAP)&quot; on a computer that you upgraded from Windows 2000 Service Pack 4 to Windows XP with Service Pack 1 or Service Pack 2 =

Article ID: 902934

Article Last Modified on 8/4/2005

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APPLIES TO

 Microsoft Windows XP Service Pack 2, when used with:  Microsoft Windows XP Professional

 Microsoft Windows XP Home Edition  Microsoft Windows XP Service Pack 1, when used with:  Microsoft Windows XP Professional

 Microsoft Windows XP Home Edition</li></ul> </li></ul>

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<div class="notice_section">

Important This article contains information about how to modify the registry. Make sure to back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows registry

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SYMPTOMS
Consider the following scenario:
 * You upgrade a computer from Microsoft Windows 2000 Service Pack 4 to Microsoft Windows XP with Service Pack 1 (SP1) or Service Pack 2 (SP2).
 * You try to configure Logon Security in the Advanced Security Settings dialog box for a dial-up connection or for a wireless connection.

In this scenario, you cannot find the following options under Use Extensible Authentication Protocol (EAP):
 * Smart card or other certificate
 * MD5-Challenge

<div class="cause_section">

CAUSE
This behavior occurs because the  registry key and the   registry key are missing or not valid in the following registry subkey:

<div class="resolution_section">

RESOLUTION
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

To resolve this issue, follow these steps: <ol> Click Start, click Run, type regedit, and then click OK.</li> Locate and then click the following registry subkey:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RasMan\PPP\EAP

</li> Right-click PPP, click Export, type a file name, and then save the exported registry file.</li> Under the EAP key, click 13, right-click RolesSupported in the right pane, and then click Modify.</li> In the Edit DWORD Value dialog box, click Hexadecimal, type 2 under Value data, and then click OK.</li> Under the EAP key, click 4, right-click RolesSupported in the right pane, and then click Modify.</li> In the Edit DWORD Value dialog box, click Hexadecimal, type a under Value data, and then click OK.</li> Quit Registry Editor, and then restart the computer.</li></ol>

Keywords: kbtshoot kbprb KB902934

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