There are several ways to fix a faulty touchpad on a Windows 10 laptop, and most of them don't require any hardware repairs.

Synaptics’ TouchPad device drivers are customized and supported by notebook manufacturers to meet specific driver requirements for their individual products. To ensure the appropriate driver for your ...

Follow these methods to fix the problem. Some of them will need an admin user account. Check Touchpad Status Enable Finger Scroll from Settings Touchpad Compatibility Update Touchpad Driver Check with ...