In order to fix the touchpad of your laptop, I recommend you update its drivers. Just navigate to the web page of your laptop's manufacturer, identify your computer model, select your operating system and download the latest drivers for the touchpad. After that, press Windows + R key combination, type devmgmt.msc and click OK. Expand the Mice and other pointing devices list, right-click on the touchpad driver and select Update Driver Software. Use the Browse option to navigate to the downloaded package, select the driver and install it following the on-screen instructions. If you still have problems with the touchpad, you will need to visit a local service center.