I'd like to add my name to this list with a few additional details that make no sense to me.Original analyze status:4 frag.files(3.5GB) 13TL fragments 9%fragmentation. After 55mins on a 160GB drive and my used space went from 39.2GB to 48.7GB Upon defrag completion analyzed again and it showed:12frag.files(126GB) 226TL fragments 26% fragmentation.My OS Vista home premium.I only used this defraggler because i'm so pleased with CCleaner.What can be done here !!!!!