transferring toolbar

My PC came with IE pre-installed. Initially I downloaded Firefox as my browser. Now I have something that is causing Firefox to stall immediately. So I have switched back to IE as my default browser. When I open,.. IE Norton toolbar is not there & I don't know how to get it from Firefox to IE. I use windows live for my email. When I click on a link in an email another IE opens up & it contains the Norton tool bar. How do I get the toolbar to my pre-installed IE.