My cursor moves while typing

Hi, I have windows 8, my computer is brand new and all of a sudden my cursor started moving while typing. It doesn't matter what program I am using whether it is the internet or word, it still moves and it always moves to the left messing up my sentence. Is there something wrong with my computer or do I need to do an update that I am not aware of. I have made sure my hands are not touching the mouse pad on the computer and that doesn't seem to make a difference, I have also made sure that the mouse is set to not show while typing but it is still doing it. If someone could help me that would be great.

Thanks