Simply put, I have 2 computers: a Dell and an Acer. My Dell is owner of a network, and and the network is online. I also have a friend in that network. He can connect to the network, and so can I on my Dell. My Acer, however, shows that the network is offline, but my friend's name and my Dell's name are both black, with gray circles beside them.
If I run the diagnostic tool on my Dell, it tells me all my peers are offline. If I run it on the Acer, it just tells me that I am offline in some networks.
All of this is for a Minecraft Server, and trying to connect to the server. It has worked before, but not anymore. I am using the latest Hamachi for both computers