I contacted OPPO Technical Support a couple of days ago and they gave me a list of all the things that they knew might cause the BDP-103 W7 network population problems. At the top of the list was Microsoft Windows Live Applications. I too uninstalled WL from one of my computers and all is well. That is why my "W7HomeServer" system worked from day one because it did not have WL installed. Also, the "Workgroup" system that shows up occasionally is a know bug that may get fixed in a future firmware update. At least in my case, turning off any mention of "Homegroup" in the W7 systems seemed to clean up the BDP-103 network population (...) display.