I am trying to use various https:// .mil sites. I get the navigation blocked error, then select to proceed anyway, and nothing happens. This is a brand new computer with a brand new version of internet explorer that Ive never used. I am not a sophisticated user, so the other help answers are not helping me. I want to access all of my .mil stuff!

Hi, Firstly, please let us know whether you are running Internet Explorer 9. Meanwhile, please refer to About certificate errors and Certificate errors: frequently asked questions. Try retyping the address you're using and see how it works. For example, if you're typing the address as https://example.com, try changing it to https://www.example.com. If issue persists, please refer to "There is a problem with this website's security certificate" when you try to visit a secured website in Internet Explorer and see how it works. Hope this helps. If a post solved your problem, click Mark as Answer on the post. If a post helped you, click "Vote As Helpful" on the left side of post.

try going to internet options > then the security tab and go to Trusted sites. After you click on trusted sites go to the Sites button and add the site here. See if you can get to it now.