Build 2202-2257: Windows NT 2000 sounds
Build 2264-2464: Windows NT 5.1 Beta Startup, NT 2000 Shutdown
Build 2465-2472: Windows NT 5.1 b2465 Startup, ditto for shutdown
Build 2474-2475: Windows NT 5.1 b2474 Startup, ditto for shutdown
Build 2481-2542: Windows NT 5.1 sounds