(((Sept))) you might not have to remove IE itself, but the add-on. Since you know which .dll is still there... try going into your TOOLBOX or TOOLS and click on Internet Options...PROGRAMS... MANAGE ADD-ONs and delete the one. actually, from TOOLS there's a MANAGE ADD ONs button to click upon.

At the bottom of the Program view... there's a place to click to make sure IE is the default browser... be sure to click on that if you wish to use Firefox or another.

Still thinking...