I've been using wifi regularly on my both laptops: Acer 5750G (windows 7) and acer switch 10 (windows 10) without any problems. I moved to Finland and got my wifi set up and neither of my laptops connects to it. It takes several minutes and constant connecting and disconnecting for them to finally gain access... The first laptop has an option to connect it through Ethernet which works just fine. My phone doesn't have any such problems, it connects normally.
I know the wifi works because it works fine on a laptop which had been bought in Finland.