So I just bought a used custom built pc online, and he reset it. When I took it home and turned it on everything worked fine, but it wont pick my wifi network. I looked at the network settings but it said it needed a ethernet cable. The guy I bought it from was using wifi so I know it can connect to it but it is not even scaning for networks now. Any help on this would be appreciated, and if anyone needs to know anything else just ask and I will tell you. Any help will be appreciated.