Catalyst did not automatically become the default browser

Microsoft made a change in Windows 8 and later, and no longer allows 3^rd^ party software to programmatically take over as the default browser. As Catalyst must be the default browser to manage navigation through all entry points for HTTP and HTTPS, it must be set as the default by end users or via Group Policy. See section 5.5 of this guide for details on how to control browser defaults on Windows 8 and later.