I've looked for your laptop at manufacturer website and I found Win 8 and Win 7 drivers.
http://www.acer.com/ac/en/US/content/drivers
Choose notebook -> aspire -> 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 list of your products available drivers provided by your manufacturer. You can choose whichever you want depend on your OS and hardware.