Cursor jumps around the screen even when I am not doing anything.
This is a touch screen issue called phantom touch. The tablet is thinking that someone is touching it and trying to open the screen.
- removing the keyboard and blowing (with a can of air) out the keyboard connection slot.
- connecting a mouse to the tablet to see if it would recognize the mouse. Once you do that, I would say to reset the tablet.
- Factory reset – http://www.hardreset.info/
If all else fails, try this information to fix the issue – https://support.microsoft.com/