I have an old windows XP client that was on an old domain years ago. We recently got a new server. When we set up the domain, it happens to have the same name as the very very old domain that this XP machine used to be on. We can log on to the machine as long as it is not in the same network as our new server, but when it is on the same network it attempts to connect up to the new domain and login is impossible. Is there any way to segregate this one machine from talking to the server WITHOUT putting it on a different subnet? I have already tried writing firewall rules on the server side blocking all ports and all programs in relation to that machine's IP, but this didn't help. My goal would be to have the XP machine and the server to absolutely never communicate with each other, but still allow the XP machine access to the internet, and to log in still without having to transfer data and programs to a new profile (which is impossible at this point, it's quite a mess in there). Any ideas?