Article ID: 947209 - View products that this article applies to.
On a computer that is running Windows Vista, you try to establish a dial-up virtual private network (VPN) connection that uses Extensible Authentication Protocol-Transport Layer Security (EAP-TLS) for authentication.
If there are no user certificates on the computer, you may receive the following error message:
Error: 0x80420100: There was an unknown error.
Article ID: 947209 - Last Review: February 6, 2008 - Revision: 1.1