I have a Dell PowerEdge 2900 running Windows Server 2003, every two weeks or so, I see a new user in my user list which I did not create, it is usually a word I don't recognize and it shows up as the user in the login screen when my monitor rests. When I log in I change it to the user that the server is assigned to, I put the password in, I go to Server Management and see the user listed under users as the first one. It does not show me a date as to when the user was created but I know it was not there 2 weeks ago. This keeps happening every other week or so. So far I have had 4 instances of this.