My HP

I have Windows 8: Now for my problem or problems. The little "line" that gives our sentence seems to have a mind of it's own. The next time it jumps around I will leave it that way so you will be able to see what I am talking about and the next is my "pointer" roams around and sometimes just slides across my screen. And now it will not do anything. Maybe it has ears and ey es. That
little "line" just jump into the middle of the eyes. Please can someone help me