I have Asset UPnP Server (version 3.0.0.1) running on a Windows XP box (SP3 and latest updates). It runs flawlessly (almost!) with my Arcam SoloNeo client. The XP box is dedicated to running as an Asset audio server. It has a hyper-threaded 3GHz CPU, and 4GB RAM (of which only about 3.4GB is usable...