Like Ethel, I'm confused. Vista is the operating system, which is different to Internet Explorer (which is your web browser). Microsoft were forced, through multi-million dollar law suits, to keep the two things separate. Internet Explorer should look the same under any operating system. There should be a bar with 'File/Edit/Views/Favorites/Help'. Clicking on 'Favorites' should offer you the option to 'Add to Favorites'.
If you still can't find it, why not switch to the (far superior) web browser which is used by the majority of the 'regulars' here in AB's Technology section?
http://www.mozilla-europe.org/en/products/fire fox/
Chris