I just install vista 64 to my xp partition drive. During the vista 64 installation, I deleted, and clicked new and format the xp partition. Which is what I want, no more xp. After finished installing vista 64, I noticed vista 64 shrink the xp os. How can I do a true clean installation using vista disk without using other software? Also, why my screen still showing the Earlier Version of Windows when I deleted my xp partition drive? Please Help! Thanks!