Just curious, is this computer on a network of any kind, even a peer to peer? I have seen Win2K computers freeze while trying to authenticate to resources on a server. Does the mouse still work during the freeze (meaning, can you move it)? All screensavers disabled, as well as Power Management disabled (BIOS and OS)? If it is on a network and that is not critical to playing your music, try disconnecting the network cable and even disabling the network card and let it run.