Need help creating TCP/IP Network with Windows 7

I know how to rename. I'll reach out to you tomorrow when I'm in the office, thank you very much.

Can you tell me I should expect issues using the switch versus extending the cable?

It is not a good idea to tie two network switches in series (i.e. one switch plugged into another switch). That said, you will probably never notice a slow down in the data on that path. Your traffic to and from the Internet is probably not that fast to begin with.

For a small business network, it is best to have only one switch. That one switch should have enough ports to connect everything to it at once. Your N300 has a 4 port switch. You plan on connecting 4 computers. That will max out the N300 for now. You can add the main printer to the "server" computer and share it from there. Or you can add the main printer using Wi-Fi if the printer supports that. Your Wi-Fi connectivity should be pretty solid if the N300 is sitting a few feet from the main printer.