If you have purchased your laptop from Asus, you can contact their technical support on 1-888-678-3688, 24/7, and explain them the situation. They will help you resolve the issue as soon as possible.
If you're not from the United States, you can find the correct support hotline on their website.
If your touchpad stopped working after you have upgraded your laptop to Windows 10, and you already have the latest version of Asus Smart Gesture driver installed, the solution is to repair it.
Start -> type Control Panel in the search box -> (Programs) -> Programs and Features -> select ASUS Smart Gesture -> Repair
If you don’t receive the email in the next 2 minutes please check your junk folder, and add [email protected] to your safe sender list.