Have been working on this SBS all day with the appropriate credentials and no problems. Suddenly, it won't allow a login with the same credentials. It says I have typed the wrong password or username. No, I have triple checked and everything is as exactly as it was just moments ago when it did work. This is a new client also. When he saw the trouble I was having, he piped up and said that he had the same thing happen to him on his workstation occasionally. He would have to restart it a few times and finally it would allow him to login again. I haven't had the chance to scan his workstation yet, as I am trying to get a firewall installed. However, I cannot imagine why the server would block a login suddenly? Add to that, it would not allow me to shut down via the login screen either! What should I try? I have no idea.