Things You'll Need
Instructions
Plug one end of an Ethernet cable into your Xbox 360. Plug the other end into your PC's Ethernet port.
Turn on both devices. Wait for the PC to send a message notifying you that it recognizes a connection between it and the Xbox 360. The message will appear in the Taskbar.
Connect your PC to the wireless network, if necessary.
Right-click the LAN icon in the Taskbar. The LAN icon resembles a miniature monitor. A menu will appear with varying options, depending on your operating system. If you don't see the LAN icon, click the double-arrow button in the Taskbar to view more icons.
XP: Click "Network Connections." Vista: Click "Network and Sharing Center." After a new window appears, choose "Manage network connections. Windows 7: Click "Network and Sharing Center." After a new window appears, choose "View Network Connections."
Single-click both the "Local Area Network" connection and "Wireless Internet Connection" while holding down the CTRL key. Both connections will be selected after you release the CTRL key. Release the CTRL key.
Bridge the two networks by right-clicking either network, and choosing "Bridge Connections."