Arrow keys no longer work on the notebook?

The left, up and down arrow keys on my Medion notebock have recently stopped working. It started with the arrows up and down no longer wanting, but then the button on the left began to spin and be permanently activated without being pressed. I had restarted my notebook, but now she doesn't want to. I think you can. Give some tips on how I can reactivate the buttons and make them work again?

Sounds like a typical Medion notebook. I think you won't get around a new keyboard.