Your making it way too hard.
If you have your n810 connected to a WIFI AP on your network that your PC is also on, just open from the main menu, choose Utilities, and choose FileManager. Wait for it to complete opening, and scroll down in the left pane, It will list Shared folders and Shared Media, sometimes they take a couple of seconds to appear. You should be able to see any publicly shared folders under the shared folders. The shared media, will work if you are using shared media with Media Player, not sure what version of Windows Media player you need.