Instructions
Connect your Xbox 360 to your home network. You can do this either by connecting your Xbox's network port to a router through an Ethernet cable or purchasing and attaching the Xbox 360 Wireless Network Adapter.
Enable media sharing on Windows Media Player on your wireless PC. Select "Media Sharing" from the "Library Tab," check the box next to "Share My Media" and select "Allow" after clicking on your Xbox console.
From the "Music," "Pictures" or "Videos" section of your Xbox dashboard select your PC and choose a media file to view.