I have a very good internet (1000 up & down) and a very good computer capable of handling this speed but randomly I will lose connection and come back and my internet speed will go from 1000 to 100. To try and fix this I changed the link speed from "Auto Negotiation" to "1.0 Gbps Full Duplex" and now I have no internet at all and can't get it back no matter what I do. I can't change the link speed back either because I need an internet connection to do that.