I accidentally hit a strange combination of powerful keys on the lower right side of my keyboard, with the result that my toolbar only appears when I run the mouse over the top of my screen, and the display of what-time-it-is has disappeared from Internet Explorer.

If I left click and open a page in a new window, the time appears again. Curiouser and curiouser.

I have tried Help and Tools. They were no help.

Does anybody know how to undo these changes?