I'm getting the following messages when I try and logon to ANZ Internet Banking (and similar for Google Mail as well):

Secure Connection Failed

banking2.anz.com uses an invalid security certificate.

The certificate will not be valid until 5/21/2008 12:00 PM.

(Error code: sec_error_expired_certificate)
 As It is well past the date mentioned I'm a bit confused. I've contacted the bank but after trying a few steps using Firefox(3) and IE7 the best they could suggest was going to Microsoft.com and updating my certificates. After searching on the site for a while I can't see anyhting that has helped. Any suggestions? I've been through both browsers settings by the way. Also I can log on the sites with my wifes PC no problem at all so it must be my Windows (which is XP Pro SP3).
Over to you!