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How to Enable EAP-MD5 Support in Windows Vista
http://www.vistaarticles.com/articles/185/1/How-to-Enable-EAP-MD5-Support-in-Windows-Vista
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Published on 12/9/2006
 
Microsoft Extensible Authentication Protocol-Message Digest 5 (EAP-MD5)
How to Enable EAP-MD5 Support in Windows Vista

How to re-enable EAP-MD5 support in versions of Windows Vista

To re-enable EAP-MD5 support in versions of Windows Vista, add the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RasMan\PPP\EAP\4

Value name: RolesSupported
Value type: REG_DWORD
Value data: 0000000a

Value name: FriendlyName
Value type: REG_SZ
Value data: MD5-Challenge

Value name: Path
Value type: REG_EXPAND_SZ
Value data: %SystemRoot%\System32\Raschap.dll

Value name: InvokeUsernameDialog
Value type: REG_DWORD
Value data: 00000001

Value name: InvokePasswordDialog
Value type: REG_DWORD
Value data: 00000001