creating home network or sharing router

[gef4000 mx 0]

I'm having an extremely hard time trying to setup my home network at my dad's house. The connection work's like this hub router (supposed to create wirless but thats another problem) computer xbox but here's what happens I have my computer working fine then I want to get on the xbox so i plug that bad boy in to the router and the only way i get it to connect is if i power wash it causing my computer to loose connection. I can't access the ipconfig in command because i've changed the settings for creating java files but i don't think renewing that would help, umm i've tried plugging in a laptop to the router but my computer only allows LAN connection which is what the problem is.