You install twice. First time you DO NOT enter the Product Key. Then you do
an in-place upgrade of Vista with Vista and this second time enter the
Product Key. After that's done, Vista will activate. See Paul Thurrott's
website for details:
[How to Clean Install Windows Vista with Upgrade Media]
http://www.winsupersite.com/showcase...rade_clean.asp
Saucy Lemon
"Peter" <Peter@discussions.microsoft.com> wrote in message
news:E14E16A0-4E53-474B-919C-6B91C8F7C71D@microsoft.com...
>I want to clean install windows vista from a downloaded upgrade version
> because I read that the performance of the computer will improve. How can
> this be done?