Some of the letters on my keyboard give different comands.

when i click letters like "C" or "N" they interact with my laptop screen instead of typing the letter on the screen. As well as that, when i click the delete button instead of deleting the button behind it it deletes the letter in front. i couldn't search for a reason for this as it was hard to describe. However i did find some sort of solution by clicking the sticky keys button which makes everything normal but only for a couple of minutes before i have to turn it of and on again.

Thank you.