Answer

The function is not working after Windows 10 automatically overrides the MSI touchpad driver via Windows Update.

To solve the problem, you can refer to the FAQ to uninstall and hide the driver updated from Windows Update and then install the MSI touchpad driver from your notebook download page.

FAQ Link:
http://www.msi.com/faq/nb-1767.html

Note: Because of the changing software architecture of Windows 10, this function might not work on some models.