Microsoft launched a page that clearly explains how to upgrade your existing system in-place from a legacy Windows OS to any Windows Vista version; or, in the case of certain systems, whether you'll need to perform a completely clean installation. Certain legacy OS' require a full system installation while others will allow for an in-place upgrade. Depending on where you're coming from and where you're going, you should determine which scenario applies to you.
Link: Upgrade Planning for Windows Vista
News source: Activewin

If you are currently using Windows 2000 Professional or Windows XP Professional x64, you are eligible for an upgrade copy to a corresponding or better edition of Windows Vista, but a clean install is required.
Does this mean what I think it does?
Huh?
Someone want to explain what this means?
but you aren't upgrading if you are forced into a clean install... yay for saving money, but booo for losing everything!
but you aren't upgrading if you are forced into a clean install... yay for saving money, but booo for losing everything!
You are upgrading. Somewhere in the install process, it will ask you for the x64 or 2000 CDs.
That term would be clearly applied to any non-current OS release. So XP would be "legacy" as soon as Vista is RTMd.
Still not sure that I would consider a version of an OS 'legacy' just because the next version has gone gold. Maybe it's just a difference in time reference points/scale. To me legacy is something like CP/M when DOS was released or DOS when Win95/98 was released... a change in generations and not just versions. If you consider Vista a full generational leap over XP/2000/NT/9x, then I'll go with you.
That term would be clearly applied to any non-current OS release. So XP would be "legacy" as soon as Vista is RTMd.
Here I thought that they legacy, they would be talking about Windows 95, 98, ME, NT 3.51 and NT 4.0 instead of Windows NT 5.0 and NT 5.1.
I have an Altair 8800 in the attic you play with.
Yup Vista is - it's internally called Windows NT 6.0 which illustrates just that (XP was NT 5.1, 2000 5.0 by comparison). Under the covers it's pretty much all new..
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