you might have hit the full screen button?
But if nothing at all shows up top- no icons or anything?
maybe you screen size was changed or settings on your monitor- does does screen seem centered or off center?

my monitor has a auto button to refresh the screen/view on the front - but only rarely do i need to use it.

2 free - well known browsers - and safer and faster than IE
if you download them them click to install them - you can import your IE favs and such to them.
http://www.mozilla.com/en-US/firefox/
http://browser.netscape.com/ns8/

I make a downloads folder on my desktop - and send all downloads to it. so I can find them and they are organized.