I have a HP laptop running Windows 8, and this worked for me. Your laptop may vary slightly, but the steps should be similar.
Open the Control Panel. (Using the screen charms, choose Settings, then Control Panel).
Choose Hardware and Sound.
Your touchpad should be listed, click on Settings.
A new window opens, click on the arrow left of Pointing.
Click on Sensitivity. On mine, I then get a “cog wheel” next to Sensitivity; I click on that, and I get a slider to adjust the sensitivity from Light Touch to Heavy Touch. Move the slider, click Close, then OK, then close the Control Panel.