I've looked for your laptop at the manufacturer website and I found Win 8 and Win 7 drivers.
http://www.acer.com/ac/en/US/content/drivers
Choose notebook -> aspireNotebook → -> E1-571Aspire → E1-571
You can see touchpad drivers listed there.
I'm not sure why this answer looks like spam so... In that website you can see a list of your productsthe available drivers provided by your manufacturer. You can choose whichever you want dependdepending on your OS and hardware.