I just started using an Asus Transformer TX300 running windows 8.1

I apparently accidentally hit a unique key combination while typing and lost my apostrophe and question mark key output which instead now output some kind of e with a diacritic. These special "e"s are hard-painted right onto the surface of the apostrophe and question mark plastic key faces on the physical keyboard itself. I looked everywhere I could think of for the solution, first in whatever "help" I could find on the machine itself, then the internet. Now here this is my last resort. Please help. Thanks, Newbie.