How to connect an XBox 360 without buying a wireless adapter.

Personally I don't know why Microsoft did not install built-in wireless capability from the get go or even install it in their future models of the XBox 360.

You can do it without spending the extra $99 or anywhere near that price for Microsoft's own wireless adapter.  If you have a latop, netbook or a desktop capable of going Wifi, here's what you do (for any Windows OS):

1.) Go to control panel.
2.) Go to network connections.
3.) Shift-left click the wireless and Ethernet connections to select them both.
4.) Right-click on either icon, while both are being selected.
5.) Select "Bridge Connection."

Once the connections are "bridged," you can now connect an Ethernet cable from your XBox 360 to your computer and now you're capable of connecting to XBox Live once you turn on your machine.

If this doesn't work off the bat, you may have to unplug your router first, then reset the modem, then plug the router again about 1-2 minutes later.