If you get the error "Navigation to the webpage was cancelled" while browsing, chances are a security setting needs to be corrected. In a previous post, I suggested a "scorched earth" settings-reset procedure, but I've found that that isn't always sufficient. Sometimes the settings need to be relaxed beyond factory defaults.
For instance, our Learning Management System (LMS) uses mixed https and http content, and Internet Explorer is often set to block mixed content entirely. Sometimes it will prompt the user but often it will simply give the error "Navigation to the webpage was cancelled." In the case of our LMS, a large clue to what is going on is that the login page appears completely unstyled, because the style sheets and images are part of the blocked content.
Adding the site to the user's Trusted Sites and setting the Trusted Sites security settings correctly has proven to be a reliable way to fix the problem, however I have to make the following disclaimer:
IMPORTANT! Only add a site to your trusted sites if you are SURE it is OK. We use this method because the site is a known site, and protected behind a firewall.
Do not go any furtherunless you are certain the site is not a malicious site.