At the time (12 months ago)there was a debate about whether it really was a loophole or a fall back position for MS.
To explain. Early adopters and indeed others who upgrade later may have software on their machines which simply will not work with Vista.
For those doing the upgrade route (not clean install) this could lead to problems. There is a body of opinion therefore which says that MS deliberately left this technique open to up graders so if things went pear shaped the MS advice desks could take installers though the clean install route. It makes sense from MS point of view.
The more I see of vista the more I wish I'd left my machine alone running trusty old XP. Don't know what to do for the best, trouble is I have programs installed which won't allow me to uninstall them and I have a Roxio driver causing problems after I uninstalled all the software and can't reload it as I no longer have the disk! What can i do!!!!!!!!!!!!!!!!
It is I know there is a patch available but when I download it, it tells me to install the software first before it can patch it, trouble is I deleted all the software after updating to vista and I can't find the original disk.