Question about Devolo Magic 2 LAN triple starter kit

My setup is the same (only instead of three PCs, I connected one media streamer and one PC, and left one port empty). I can't tell you what exactly is causing your problem, but I can at least tell you that I also have the problem that the PC doesn't get a network every now and then. I can run "ipconfig /renew" and the like as often as I like, or unplug and plug in the LAN cable: the Devolo just doesn't seem to recognise that a client would like to have a network now... (or else it has completely crashed). I then disconnect and reconnect the Devolo "transmitter" (i.e. the one connected to the router), and then it usually works again (after a short setup time). This is a bit annoying, especially if you have all the other 230V consumers plugged into the Devolo socket: of course they are all briefly de-energised during such a reset action, which is not always desirable... In the meantime (contrary to the manufacturer's recommendation) I have plugged in the Devolos via a multiple plug and left the 230V socket on the Devolo unused: this way I can at least do a Devolo reset without other devices losing power... (Presumably the data throughput suffers due to the multiple plug, but this is not noticeable in my use).