I have an Asus U47A laptop which I upgraded to Windows 10 without errors. After the upgrade I had no Ethernet/WiFi connection and messages suggested possible driver problems. I downloaded drivers from Asus website indicated for Windows 10 and subsequently generics from Microsoft and Intel. Nothing worked. I tried to set up an external USB router link: same error message. I went through all the discussions I could find on the web for similar problems, finding no fixes. Called Asus tech support. The said the U47A was incompatible with Windows 10 and it wasn't their problem. Tried to download a Windows 10 is one but apparently Microsoft uses the code from the machine you are going to apply the iso to and you can't use one download on a different machine. They're assuming the machine with the bad install has an Internet connection. Searched the Microsoft database but could find no similar cases. Catch-22!