I have recently dealt with this same issue on an Asus laptop. The touchpad does not function correctly, but the issue is sporadic. A USB mouse works fine.
The first thing I needed to determine was if this was a hardware problem or a software problem (OS or Drivers).
So what I did was wait until the touchpad stopped working and then rebooted with a Linux Ubuntu USB stick connected. Booting into Ubuntu I found the touchpad still did not respond. This told me that the problem was hardware. The touchpad has to be replaced.
So that is what I would suggest. You need to know what kind of problem you are dealing with so you know in which direction to focus your efforts.
Ubuntu for USB here: Download | Ubuntu
(You have the option to "Try It" or "Install". You just need to try it)