My laptop (dell) has a ghost!?

My laptop (dell vostro) has a ghost! The spacebar types itself on the screen so I can't type anything! Plus if I manage to get onto a webpage, the the page acts like someone has hold of the scroll bar and is moving it up & down!

Turned it off and on, a few times! And now when I turn it on its opening in the setup!

I've looked through all settings etc, can't seem to find anything wrong!

It has me stumped completely!!!

My laptop is still under warranty, but I'm trying to find out if its something simple before I have to go through all the hassle of sending it to them.

Hoping someone can help!!

Thank you

Julie