The first screenshot might indicate that you did not start netinstall with administrative rights.

And you followed the netinstall manual to the point? Disabling all network interfaces except teh one being used for connectin to router, setting manual IP address, allowing netinstall.exe in firewall (or disabling firewall altogether), etc.?

netinstall is indeed very fragile process (we can argue if this needs to be this way, probably not but that's the way it is now) and one has to make everything right or else netinstall fails.