So did you GO to Acer's Website?
http://us.acer.com/ac/en/US/content/drivers
If you did and searched for your model there is 1 Wired driver listed and 3 different Wireless drivers. I don't know which one is the correct one, but your WIRED connection should have worked first as the correct driver.
If you clicked on the documents which provides a PDF version of your QUICK GUIDE you got with the laptop, as I SAID TO DO, you would go to page 6 and it states
"<Fn> + <F3> Communication Enables/disables the computer’s communication devices."
So if you accidentally did that key combination you disabled it that way, also check your BIOS configuration to ensure WIFI is enabled as well.
If your completely lost with ALL this, then you need to take it to a Tech Service to assist, because you need at least a basic technical understanding to do all your trying to attempt.