[Please also read the Action Pack FAQ on this blog at http://uksbsguy.com/blogs/doverton/archive/2007/02/13/windows-vista-windows-xp-office-2003-and-office-2007-action-pack-update-my-faq.aspx ] This has been discussed lots on the aliases and in the comments on this blog, so here is what I did to do a clean install. In Summary, the process was: Boot Windows XP on the machine Log in (I used an Administrator Account) Insert Vista DVD Start the Install Type in Product Key Select Advanced install Select the disk and clean install Wait for Install to complete (I am not going to talk you through entering your name etc) Log into Vista Run the "Free up Disk Space" tool from the control panel to remove the Windows.old programs If you are worried about clean installs in the future, use the backup tool to do a hard disk image backup now In pictures, it looks like this: Just to clarify a few things - yes, before you blow away your old OS, don't - you can move it to one side and then migrate any documents and then remove the...