Please help! Question about new Vaio Laptop!?

Please help me! I got a EB Series Vaio Laptop a week ago! It is so cool but there is one problem. You know that thing below the keyboard on a laptop that is like a mouse but is on your laptop and senses your finger (I forgot what it is called)? Well, when I go on the Internet and I try to move my arrow pointer using the thing below the keyboard, it zooms in and out. It is sooooo anoying! Please help! Thankyou! Ahhhh! It just did it again!!! *GROAN!*