I recently wiped all of my three hard drives clean, including my OS harddrive, by formatting them. I did this through the Windows Vista Home Premium Upgrade disk and then I proceeded to do a clean installation of Windows Vista with the disk. With my current OS disk, the only option I have is to do a clean install because I'm not upgrading my OS from a previous OS. The problem I am having is that I cannot activate my Windows copy, which I have 29 days to do, because of the fact that the Vista OS disk I have is ONLY for UPGRADES. I don't have any Windows XP copy to install so there is no way I can upgrade back to Vista. To summarize this, I need some way to downgrade my OS so I can then upgrade to Vista through the Upgrade disk, which is currently my ONLY OS disk. If anyone has any suggestions or solutions, they would be greatly appreciated.