Take the 2-minute tour ×  one of my coworkers installed IE9 on
their computer. They are now having trouble accessing some
websites that once worked(and still work) in other browsers.
In Firefox and Chrome, there is no certificate error and the
certificate is verified and such. In IE9 it will say
"Certificate Error: Navigation Blocked". When pressing the
"continue to site" button though, nothing changes, it just stays
on the same page. We've tried adding the site to trusted sites,
but nothing is helping this.  Is this a bug in IE9 or is there
error elsewhere?  Also, it's not a cache issue because this is
the first time accessing that site from that computer. And that
site works fine from Firefox and Chrome on that computer, and
works fine from IE8 on my computer.  share|improve this question
Unsure if anything has changed since you posted, but I had no
issues viewing the page without errors on my computer with IE9.
–  edusysadmin Jun 3 '11 at 18:53 Is your IE9 configured other
than default by MSFT? –  Ram Se