I have this problem with several Windows 8 laptops. Often changing the way you bend your finger helps and you do tend to get used to the sensitivity after awhile. Usually, I have my clients plug in a mouse
I've noticed that a lot of the new laptops have such sensitivity that they making typing difficult so they have added a feature where double tapping the upper left corner of the touchpad turns it on or off.
Hang on... I've got a brand new Toshiba Satellite with Win 8 here...
Nope, no sensitivity adjustment settings in the control panel applet for it. So before you start trying new drivers make sure that they include the ability to change sensitivity. Messing with touchpad drivers can get you in a complicated mess trying to get it working right.