Hi,
Sorry to hear that you still have the problem, go to BIOS settings, in Main tab switch to Basic from Advanced and see whether you are able to use Synaptics touchpad driver.
After switching to Basic mode in BIOS, go to Acer support site abd download the Synaptics driver(version 19.0.7.31) and install it.
https://www.acer.com/ac/en/GB/content/support-product/5674?b=1
