Hello hiramj5077, welcome to the Microsoft community, I'll be happy to help you today;
I understand that the touchpad of the Acer Aspire A315-56 laptop has stopped working;
Initially I recommend that you try to reactivate the touchpad;
Press FN + F6 or F7 key,(the function key with the touchpad icon key at the same time);
Check if the Touchpad now works;
If it still doesn't work, reinstall the latest driver for the Touchpad:https://global-download.acer.com/GDFiles/Driver...
Hope it works, see you soon!