We originally setup a fairly basic Windows network. It included Windows XP Pro clients connected to a single Windows 2003 Server. The server did hand off some tweaks in the domain policy and all worked well when connecting to this server.
A couple of months ago we migrated the all of these workstations to connect to another Windows domain managed by a different W2003 Server with a different AD (and we also demoted the original W2003 server so it was simply a member server).
Now on random occassion when a user try and login they are able to enter their user id and password, but after they click ok the login process never completes. The screen goes to a blank blue screen and hangs. Often I force a shutdown on the workstation, wait a minute and then log back on and then the login process completes as it should.