Make sure that the selection is correct or choose another keyboard layout. If you don't know which layout your keyboard has, look in the specifications that came with your system, or ask the computer vendor. There may even be a label on the keyboard that identifies the layout. You can also look here: en.wikipedia.org/wiki/Keyboard_layout

If your keyboard isn't in the list shown, click on More to get a full list, and select your keyboard there. Note that after having chosen your keyboard, you will return to the first screen and it will appear that a keyboard from this first screen was chosen. You can safely ignore this abberation and continue the installation: Your keyboard is the one you chose from the full list.

If you choose a keyboard based on non-Latin characters, you'll get an extra dialog screen asking how you would prefer to switch between the Latin and non-Latin keyboard layouts