After a firmware update to Version 1.11 (default setting: 1:07) I could connect to my UPNP server to connect and see the UPnP feature in the software. Upon delivery, was only "medium" (USB, eSATA) or "network share" visible.
Failed to produce 7 PC Connection to a network share on my windows. According to various posts in forums there are general problems.
With a little effort can be the start script of the box to adjust, so that the Windows is set up when you boot the box 7 release via the mount command from Linux.
The own multimedia files can then be accessed via the "Datentäger" option of the box.
Alternatively, you can just wait for a firmware update.
Update: With the firmware 1:17 from mid-December, the problem with Windows 7 is released.