I just wonder Is there any command line torrent client ?
Edit: another thought: I assume that Python based clients should run under Windows too if you install Python. Though off the top of my head I can't think of such a client that is actively maintained (the original "official" client was Python based, but IIRC uTurrent has replaced that).
aria2 is a command line downloader with BitTorrent support and Windows binaries available.
aria2 supports torrents. It's a multi-platform project (Win32 included).