1. A method of configuration of a client computer system in a cluster comprising a plurality of computer systems at least one of which is an administration computer system, the computer systems of the plurality of computer systems being connected via a network, the client computer system being configured to allow booting from data stored in the administration computer system, the method comprising: obtaining a boot media image making it possible to boot an operating system of the DOS type and obtaining configuration data from the operating system, the boot media image and the configuration data being received from said the administration computer system via the network; booting and configuration of the operating system, wherein the booting and configuration comprises creating a virtual storage disk; analyzing the configuration data received and, in response, obtaining at least one program for the configuration of the client computer system, said the at least one program for the configuration of the client computer system being received from the administration computer system via the network and stored in said the virtual storage disk; and executing the at least one program for the configuration of the client computer system.