The Digital Living Network Alliance (DLNA) is a trade organisation that comprises most major electronics and software companies. DLNA maintains a strict set of guidelines that allows computers and other devices to share digital media via a network. If you have a Windows 7 laptop and you would like to use its DLNA capability, you need to use the Windows Media Player software installed on your system. Media Player allows Windows 7 users to stream their media to DLNA-compliant devices on the same network.
Launch the Windows Media Player from the icon in the "Programs" menu via the "Start" button on your computer.
Click on the "Switch to Library" button on the right side of the player.
Click on the "Stream" option and then click the "Automatically allow devices to play my media" option. This turns on the DLNA-compliant capability of your laptop.