I purchased Windows Vista Ultimate Upgrade yesterday in loaded it just fine
on my machine that was running a validated version of XP Pro using a clean
install. Everything went fine as I poked and tweaked with some of my other
software installs. After loading all of my stuff, even that I did not want
just for testing purposes I decided to do another clean install of the OS to
wipe out any of the junk I did not want.

I installed the DVD, fired up the machine and booted from the DVD. Went
through the installation process, a clean install, entered the key and
formated my drive. THats all the farther you can go, I get the "To use the
product key you entered, start the installation on a computer that is running
a genuine version of Windows".

So no I need to reinstall XP Pro, do the updates to get the WGA installed
and then re-install Vista.

If this is right this is total garbage, everytime I want to do a clean
install I need to install the previous OS first? As someone who works in the
tech industry I iften need to install other 3rd party software for testing
and review. In the past when it bunged up my machine I would just do a clean
install, insert my previous verison of windows and go on my way.