If you have an active Internet connection in your home you can connect to the online service called XBOX Live through your XBOX 360 game console to download content or play games with other XBOX Live users.
Normally you would need to connect an Ethernet cable from your console to your router, but if you have a wireless network setup you can also connect wirelessly by taking advantage of a special network adapter sold by Microsoft.Laptop accessories(Laptop accessories)
Turn on one of the computers that is connected to your wireless network and click on the "Start" button on the bottom tool bar. Click on the "Control Panel" and then choose the option that either says "Networking" or "Network and Sharing Center," depending on which version of Microsoft Windows you are using.
Make a copy of the name of the wireless network setup between your computers.
Wireless Network Adapter
Plug the wireless network adapter into the USB port on the top end of the back side of the XBOX 360 console.LCD Panel(LCD Panel )
The Middle X Button
Push the green and silver "X" button at the center of the controller and then immediately let go of it to bring up the main menu. Navigate over to the "Settings" menu on the right side and then choose the option that says "System Settings."
Highlight the "Network Settings" button and then press "A" on the controller. Choose the option to edit the settings and then type the name of your wireless network into the "SSID" field.
The Left X ButtonCell Phone Accessories(Cell Phone Accessories )
Backup through the menus until you are back in the main controller menu that has several different tabs. Press the blue "X" button on the right side of the controller to bring up the login menu and then choose the account that is signed up for XBOX live to sign in.