I upgraded my laptop to Windows 10, and now I can't see LAN servers (Minecraft, COD, etc).
If I start a LAN server from my desktop I am not able to connect to this server from my laptop. (I tried direct connect too). The Minecraft tells me:
Failed to login: Invalid session
My laptop and desktop are on the same network. Before the upgrade it worked perfectly, but now I don't know why it doesn't work.
Even though this is an old question it remains unanswered and as i encountered the same problem, which took me some while to figure out, i'm sharing my solution here.
If whitelisting your application/ports in the firewall does not work, this might:
If you have several network interfaces, disable all interfaces you do not use/need for accessing the server in question. You can do this as follows: