|Do not update the driver through Device Manager. Download the driver from the Acer website. On Acer laptops, the wireless device is usually an Atheros one, but your's may be different.|
Select your model name & number on the Acer website and you should see the drivers which are correct for that model.
Go here: http://support.acer.com/us/en/defau...
The default region is "United States". If your laptop was designed for a different region, click "United States" at bottom left of page and select your country from the list.