I'm using uTorrent, I find it very simple and friendly and completely reliable to use and although it complains on startup about Vcom utilities (as does a few other programs I use it still works fine. I"m yet to try uploading anything on it but if it is as simple as when I put back some files I was seeding so that uTorrent could see them and then add a tracker then I'm all set once I get a bigger hard drive LOL