If your Wi-Fi stopped working after a Windows update, roll back the driver in Device Manager (Properties → Driver → Roll Back Driver).

The Acer Nplify 802.11 b/g/n driver enables your Acer laptop or desktop to connect to Wi-Fi networks (Wireless B, G, and N standards). Without this driver, your wireless adapter may not function, show "No connections available," or display error code 10 or 43 in Device Manager.

Acer Nplify 802.11 b/g/n Wireless Driver Download for Windows PC