Daft question,but do you have the Lan drivers installed? Puzzled that as you say that you were not asked about network type,hence my question. As I reinstalled Windows 7 yesterday, (Mobo and SSD upgrade) and it was not until I installed the Lan drivers that I was asked about whether I wanted to join an existing network etc etc. But you should not have to enter any router settings, once that is set up anything you connect, at least by Ethernet,should just work.
Have I missed something in your post?