AT&T U-verse Media Share 

The AT&T U-verse Media Share Wizard allows computers running Windows XP, Windows 7, or Vista operating systems to stream photos or songs supported by Windows Media Player 11. To view the Unknown Device, it is necessary to enable Media Share on the AT&T U-verse TV receivers. After running the Media Share Wizard, it may be necessary to re-select the Media Share option on the AT&T U-verse TV receivers. To do so, use the AT&T TV remote control and select Menu > Interactive > Media Share on each TV receiver.