Click the box at bottom left Start
select Control Panel
select Region and Language
select Keyboards and Language
select Change keyboard
-> here you might need to download the driver,
which keyboard do you have? US, GB, De, CH, Fr ?? https://www.google.ch/search?q=keybo...yboard+layouts
select Install/uninstall languages..
select Choose a display language
if you still can't get it right, take it to a computer shop.