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