The error below just started happening at work with a personal laptop running Windows 7 Ultimate. I'm unable to use installed, non-expired certificates to connect to a private wireless network. No recent changes were made by IT that would explain the issue. It worked fine several weeks ago and happens on two laptops I own.

The details and some screen shots are here: http://www.wiredprairie.us/blog/index.php/archives/906

The error we don't understand is this:

The credentials provided by the server could not be validated. We recommend that you terminate the connection and contact your administrator with the information provided in the details. You may still connect but doing so exposes you to the security risk by a possible rogue server.

The server XYZ presented a valid certificate issued by Company Name Certificate Authority but Company Name Certificate Authority is not configured as a valid trust anchor for this profile.

We don't know to to resolve the issue without ignoring the error (nor what's changed that could explain this new error).

Update: The new information is that we have our own Root CA, and that the certificates were not updated recently, nor have any expired.