My husbands Dell Inspiron 5559 connects wirelessly to the gateway but not the internet. It works with ethernet when connected to the router. I have an extender and it did connect wirelessly to that but it is a slow connection. I bought a netgear wireless USB adapter and at first it worked but now it won't connect to the internet either, does say it is connected. Only connects to the extender. I have tried every solution on the internet, release and renew ip, dns flush, reinstalled the drivers for the wireless card, disabled and reenabled wifi. I'm losing my mind, please help.