I run Xp as a virtual machine (installed on top of Bootcamp) using VM Fusion, (which is similar to Parallels). I get differing but equally adamant answers to a very simple question: Does Time Machine back up everything that is on the Xp side of my computer? The confusion in answers relates, I think, to the fact that one can first partition a HD with Bootcamp, install Xp, and then install VM Fusion (this is what I did), OR one can install VM Fusion directly without ever using Bootcamp, and then install Xp. This seems to lead to two different results with respect to how TM "sees" what to back up. So, getting back to my question, given the configuration I used, does TM back up all the files on the Xp side of my computer?