Network Connections

I’m in a dorm at college, where both I and my roommate are connected to the Internet. We tried to transfer a file by going through the Network Setup Wizard in Control Panel, but it failed and I don’t want to try to send it anymore. Which of the below connections should I remove? How do I remove the connections I created through the setup wizard?

Also, for some reason after running the wizard, I have to click on my name on startup in order to type in my password. Before it was automatic focus on the text box. So how do I set it back to normal?