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You would need Samsung Wireless LAN Adapter WIS09ABGN, WIS09ABGN2, WIS10ABGN (any of them) to connect the TV to your router for DLNA conenction, install AllShare software in laptop and playback video file to watch it on this TV. Please click following link to download TV user manual and check page 26 for detailed instructions about network setup..
Please check following Samsung link for firmware update file that might help to improve TV performance..
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