Scrambled keyboard

So I get a small problem with my keyboard where my keyboard is not working as it should. Small example:
CTRL+Z = Undo
CTRL+Y = Redo
So those two hotkeys switch functions for some reason (just happens randomly, or it’s possible I press a key I’m not aware of) where CRTL+Z becomes Redo and CTRL+Y becomes Undo. They Switch functions.
And not just that. I noticed some of my letters and signs are not right… When I wanna enter “_” i get “?” and so on… like my keyboard gets scrambled…

Any idea what could cause the problem?
Restarting the Unreal Engine seems to solve the problem, but I don’t wanna be restarting it every now and then…