On some laptops we've seen where the time zone was set dead wrong, or 
the time was off they would also get that error.  We fix the time and 
set the right time zone and it works, but on a few we had to use 
Michael's method below. 

Stanclift, Michael wrote:
> There is an option in IE7 under the security settings that you can turn
> off that is something to the effect of "check for security certificate
> revocation" that will stop the error from showing up. We have the same
> problem though and have not been able to figure out why it happens.
>
> I don't think the option is even available in IE6 and in IE7 on XP I
> think it's already turned off by default.
>
>
> Michael Stanclift
> Network Analyst
> Rockhurst University
>
> Conway Hall, Office 415
> 1100 Rockhurst Road
> Kansas City, Missouri 64110
> (816) 501-4231
>
>
> -----Original Message-----
> From: Cisco Clean Access Users and Administrators
> [mailto:[log in to unmask]] On Behalf Of Dale Harville
> Sent: Friday, September 21, 2007 8:34 AM
> To: [log in to unmask]
> Subject: Revocation message with Vista and IE7
>
> I have Clean Access Version 4.1.2.1 running in-band mode.  Whenever a
> student with a Windows Vista laptop running IE7 connects and after the
> password has been verified, they get a message "Revocation Information
> for the security Certificate for this site is not available.  Do you
> want to proceed?" No mater how many times they hit yes, they never get
> past this screen.  IF they close the box, they are thrown into the
> temporary access group.  Laptops running Windows XP and IE6 work just
> fine.  Any idea why this is?
>
> Dale Harville
> Network Administrator
> Infrastructure Operations
> Galveston College Information Technology
> 4015 Ave Q
> Galveston, TX. 77550
> Voice: (409) 944-1356
> Fax: (409) 944-1356
> Email: [log in to unmask]
> Monday-Friday 8:00am - 5:00pm CST
> "Try not to become a man of success, but rather try to become a man of
> value."   Albert Einstein
>