If you use Acer laptop and your WiFi driver is not working, don't worry! I have a solution for this. The problem happens because of lack of updates. You have to update your driver in this case. What you should do to update? Go to Device Manager, choose the Network Adapter. Inside it, you get WiFi driver option.
You have to click on this and update. If you are still facing the issue, I would suggest you to contact the Acer's customer support team. Thanks!