Open IE and near the top right click and select address bar. If it's
selected and you can't view it unlock the address bar if it's locked and
drag stuff around (can't say what as I can't actually SEE your PC) and you
should find it and be able to move it back to the proper place where you can
see it in the future.
If you see the smallest piece of the Address Bar (usually the name)
then stretch the Address bar back to a normal size and move it if
necessary. If the Button Bar or some other bar is to the right of it,
you may want to move that to a different position first.
Don't forget to ensure "Lock the Toolbars" is unchecked in
View-Toolbars.