Acer One S1002 not connecting to WiFi

Hello,
I bought an Acer One 10 Notebook for my daughter a few weeks ago and it was connecting to my WiFi without any problems, then a few days ago it just stopped and now it tells me that no networks are available. My other wireless devices work without any problems. I've checked the computer for a wireless router button along the sides and top of the computer; it does not have one, I've tried using the command key and F3 but all that pops up is airplane mode on and off. I started downloading new drivers but I can't figure out how to complete the process. Please help, she needs the computer for school and I'm at a loss.