Hi,
Here are some troubleshooting steps that may help in solving the issue.
- Start by connecting an external USB mouse onto your laptop and see if it will work.
- If the external mouse will work, proceed with uninstalling/reinstalling the Touchpad driver.
- Go to Device Manager and uninstall the Touchpad driver.
- Once uninstalled, download and install the latest driver from Lenovo.
- Here's the link:
http/support.lenovo.com/ph/en/products/laptops-and-netbooks/100-series/100-15iby?beta=false
- Reboot your laptop once the driver has been installed then test it again after the reboot.
Hopefully this will help.