OK.
I'm guessing you have to go to autorun.
Understand before you begin-----you did a clean install of Windows a couple of hours ago. If autorun fouls you up in some way, you can clearly do another clean install to get back to where you are right now, if push comes to shove.
I assume you have no qualms or fear about doing that?
If so, go ahead with autorun and immediately look for some way to get at drivers generally and Ethernet/network adapter/network interface/NIC whatever term Dell may use.
Ideally, a menu will come up in ordinary English and you simply make a choice from the menu and then try to locate that driver and just poke it.
Post back if you are unsure about any menu or choice you see.