Navigation Blocked - And no Fixes worked

Ok Here it is - a new vista system, and I cannot get into my email or access some secured sites. I have an XP system with IE7 and it is working fine to get to these sites.

I have cleared all the caches, history, temp, etc., did not fix.

I have checked all the various SSL including 1.0, did not fix.

I have pulled down firewall, did not fix. Of course, put it back up.

I have added secure site to list and unchecked require authentication, did not fix.

I wish I could download the certificate - but I cannot get to the site!

When clicking continue to site, the navigation blocked appears and will not allow me to proceed.

I have unchecked the two URL certificate required settings, did not fix.

I have tried to download firefox/other browers - will not let me - says downloaded but not done!

Also, there is no system restore point - this is a brand new machine.

Cannot find any definitive hot fix info on this from microsoft.

I have done a complete brower reset, did not fix.

HELP, please.

Remove all certificates. Make the secured sites trusted.

Thank you for your help. I removed all the certificates which the system would permit me. To be specific, I was not able to remove them all as the "remove" button was disabled. Is there another way to remove them than through internet options...?

I restarted IE and, no fix.

Is there another suggestion?

Are you behind a corporate firewall that has content filtering? Did you add those sites to your trusted sites list in IE?

Hi,
Do you pass this verisign test?
VeriSign Browser Advisor - SSL Certificates or Secure Sockets Layer (SSL) Browser Test by VeriSign, Inc.

Hi There,

Test completed - passed all 3 criteria. Any other suggestions????

Try IE 32-bit instead of IE 64-bit. I believe both are installed in Vista x64.