After buying a new PC, install Windows 7 and/or Linux. For Microsoft Windows 7 the TUM has a Campus License, meaning that no special license needs to be bought e.g. More on the page software
Network configuration is automatic, as DHCP is provided without MAC filtering by the LRZ. The only thing needed is then to install the printer drivers as described in the user documentation. Install ubuntu from the special UniverseCluster DVD edition and all printers are already configured.