After reading this thread, I kept an eye on XoloX, especially after shutting it down. This is what I found out: Ocassionally, it keeps some connections open, even after the systray icon disappeared. But they are all either incoming or outgoing gnutella network connections. There was no listening socket. I suppose, it's trying to correctly log off from the network, but I could not find proof for that as I forced it to exit. So, if it still runs, even if you told it to exit, and if you're impatient, just press ctrl-shift-escape, or ctrl-alt-del, or whatsoever and remove it by yourself.