So after I first started copying all my movies to my HTPC (vista machine) I noticed at one time that vista was showing more used space than was there. Today I finally got around to finding out what was up. Quick search reveals that vista, with restore points enabled, can use lots of space. In my case 90gigs. Fucking ridiculous. Forgive my ignorance computer gods but why would a 12 gig OS require 90gigs to 'back itself up". Converse away, I'm off to find the answer now. Gotta see MS's explanation to this one.