Some computers are used to replace Thin Clients because they have more power and we are able to install a tool, which is used by a group of unnamed users.
As the computer boots up a domain user automatically logs in with username and password. This´user has the same name as the name of the computer.
ARM won´t create the user because the computer with the same name already exists, although via Active Directory Snap In it is no problem to do so.
ARM should be able to check wether it is an user or a computer that has the same name as the user that I´m about to create.