KB2549091

On Windows Vista and later, the Win32_NetworkAdapterConfiguration class is unable to retrieve information about a PPPoE connection and VPN connection.
If a program is designed to get the information about the dial-up connection or a virtual private network by using the Win32_NetworkAdapterConfiguration class on Windows XP, it may not work on Windows Vista and later.

For more information about the Win32_NetworkAdapterConfiguration class, see the following MSDN documentation:

Win32_NetworkAdapterConfiguration Class
http://msdn.microsoft.com/en-us/library/aa394217(VS.85).aspx

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