I have had the same problem of chromecast dropping off the network. I notice the problem the most when cast from Real Player Cloud. It is interesting that when the chromecast drops, the video is still streaming on my laptop that I cast from. If the problem was with anything other than the dongle, I would loose the signal on my laptop as well. So far I have: 1)changed USB cable; 2)changed the power from USB to direct connect to a electric outlet; 3)connected the dongle both directly to the HDMI port and with the extender; 4)checked signal strength (which is 100% at -49dBm); 5) the chromecast dongle is only 18 feet from the modem; 6) checked that I am the only one using the channel set on my modem within my neighborhood. I did get a little improvement when I changed the USB cable and again when I changed to direct power. But the problem still persists. Sometimes it will cast for 10 minutes then drop, sometimes it casts 20 or 25 minutes before dropping. Usually after about 10 minutes the chromecast reconnects to the network without me doing anything. Very frustrated.