Recent installation, no network adapter required
Recent installation, no network adapter required
You haven't downloaded or installed the Ethernet driver from the ASUS support site.
It's actually strange... my mobile didn't include network drivers, yet it stayed connected normally since Windows used the standard ones. The main thing is figuring out *how* you got Windows installed (and when). Also, if you want a quick fix, using a USB stick is definitely the best option.
Use an external USB adapter for Ethernet. It's my preferred method when drivers aren't included with the device.