Things You'll Need
Instructions
Set Up Xbox 360
Plug one end of an Ethernet cable into the Ethernet connection on the back of the Xbox 360. Connect the other end of the Ethernet cable into the Ethernet port on the modem.
Turn the Xbox 360 on. Navigate to "Settings." Select "Network Settings" from beneath "Settings."
Select "Automatic" from the choices presented in the screen that appears. Follow the menu prompts to finish setting up the Internet connection to the Xbox 360 through the modem.
Navigate back to the Home menu when you are told that the process of setting up the Internet connection has been completed. Turn off the Xbox 360.
Set Up the Computer
Plug the USB end of the USB-to-Ethernet adapter into the USB port on the modem. Plug an end of an Ethernet cable into the Ethernet connection on the USB-to-Ethernet adapter. Plug the other end of the Ethernet cable into the Ethernet port on the computer.
Turn on the Mac. Wait for the desktop to appear. Go to the "Apple" menu, select "System Preferences" from the drop down menu and select "Network" from beneath the "Internet &Wireless" tab in the window that appears. Confirm that you are connected to the Internet by noting the "Ethernet Connected" icon in the upper left corner of the window that appears.
Turn on the PC. Wait for the desktop to appear. Eject the disc tray of the DVD drive. Place the installation disc that came with the USB-to-Ethernet adapter onto the disc tray. Close the disc tray. Double-click the icon of the installation disc when it appears on the desktop. Double-click the installation program inside of the window that appears. Follow the menu commands to install the program into the Windows operating system. Quit the installation program when text appears stating that it is done. Right-click on the icon of the installation disc. Select "Eject" from the pop-up menu. Eject the disc tray, remove the installation disc and close the disc tray. Restart the PC so that it can automatically recognize the USB-to-Ethernet adapter and connect to the Internet through the modem.