During the installation you need to validate the "TighVNC Server" option. Both configuration options "Register TightVNC Server as a system service" and "Start or restart TightVNC service" have also to be selected.
Lors de l'installation valider au minimum l'installation de TightVNC Server, puis les 2 options de configuration "Register TightVNC Server as a system service" et "Start or restart TightVNC service".