A first computer of a plurality of computers in a server computer system may be associated with a first user on an exclusive basis. An administrator of the server computer system may utilize an administrative user interface in order to specify the association. Associating the first computer with the first user on the exclusive basis may prevent users other than the first user from using the first computer. In response to receiving a request from the first user to connect to the server computer system, the system may operate to determine that the first computer is associated with the first user on the exclusive basis and may assign the first computer to the first user. Once the first computer has been assigned to the first user, the first user can begin using the first computer. In some embodiments the first computer may be a physical computer. In other embodiments the first computer may be a virtual machine.