IE8 Installer Asking to Set IE8 as Default Browser
Microsoft has made some changes in IE8 installer, now if you running IE8 installer on a machine that is already have some other browser then in this case you will find that IE8 installer will offer you an option to set IE8 as your default browser and import settings from other browser.
The goal of the IE setup experience is to put IE users in control of their settings and respect existing defaults. IE will never install, or become the default browser without your explicit consent. However, we heard a lot of feedback from a lot of different people and groups and decided to make the user choice of the default browser even more explicit. This change is part of our ongoing commitment to user choice and control.
Specifically, users who install IE8 and have another browser set as the default will now see this panel as part of their first run experience:
