Hmm...that's a pretty hard question. If we're talking within the context of the question, and the question only, then i would have to say that i consider virii as a more dangerous threat to users. Isnt it sometimes a virus can also act as spyware in some sense? Like when it sends information from the infected computer to a remote terminal, in some ways, that alone is already an act of spying...similar to what spyware would do. Well, at least that's my view... Of course, each one of us has different views and opinions this this is a highly debatable topic... I've read through the other replies though, and i believe that most if not all also have merit...like i said, this is a highly debatable topic.