You must have the Point-to-Point Tunneling Protocol (PPTP) set up on your machine before you can connect using a secure connection. ...

You must have the Point-to-Point Tunneling Protocol (PPTP) set up on your machine before you can connect using a secure connection. To set up the PPTP protocol, exit from Connection Manager, and then use the Network icon in the Control Panel.  After installing PPTP, you must re-install Windows NT Service Pack.
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