Goto the acer website, and look for Quick access software. Run it. Is this a windows 10 os?
You need to go to control panel, Next go to "Network and Internet" and then "Network and Sharing".
and click on "Manage Wireless Networks".
If you find this option and you unable to connect wifi, What error message are you getting? and which media do you using?
You can review the wifi icon to see if the line is not visible, maybe your laptop has not installed the driver