Internet connection problems?

[me]

is it 360?

You need a wireless card to connect to wireless regardless if it's a desktop or laptop. You also need a wireless router to work with the wireless card. The router would connect to your cable modem and then each of your computers (including the Wii) would feed off of that router.
also, your router signal might not be strong enough.

make sure you have a wireless card on the desktop.
as for the xbox...
im not sure .
perhaps some routers dont work with xbox

here are some sites that may help:
http://compnetworking.about.com/b/2006/0...router.htm

http://compnetworking.about.com/od/wifih...router.htm