Connection to the internet issue

Question

My son has an acer aspire one notebook. It has only been used three times. The problem is with the internet connection. It was working fine on a wireles connection but when we have come to use it today it wont connect. I have tried connecting it with a cable but it still doesnt like it. So i then went into the setting and then network connections but it wont let me go any further. If i click on this it just remains on the same screen. So i cannot still connect to the internet. Howver we have touched any od the settings either. Can you help to fix this?