I now have a dual boot setup - XP and Vista - on two separate SATA internal drives. XP on the original drive is shown as the "system, active" drive and Vista is on the added (second) drive. When I boot up now I get the Windows Boot Manager page and choice of Eariler Version or Vista. Vista is the default. I would now like to use Vista exclusively, delete XP and reformat this drive for storage. How do I make the second drive with Vista the active drive (and a bootable drive?) before I delete XP. I have read all of the general info and postings on dual booting but I can't grasp exactly what I need to do to avoid a non-booting computer. Thanks for any help.