This article presents nothing new as far as I can tell. That's just how it worked with Windows 7. The real question is, can you do a clean install on a blank hard drive, or how would one RE-install Windows 8 clean later if needed, using this special "Upgrade" install of Windows 8. Microsoft has said so far that a previous version of Windows 7 must be installed on the PC to install the upgraded. Especially, once you upgrade to Windows 8 and might need to do a clean reinstall of 8 later, does that mean I first have to reinstall 7 (or Vista or XP) and then use the 8 install to wipe that out and reinstall 8? And even with just my initial upgrade to 8, what if I want to use the opportunity to upgrade my hard drive, or maybe switch to an SSD? Do I really have to install Win 7 (or vista or XP), on it and then use the 8 "upgrade" to do the 8 clean install? THOSE are the questions I want to know the answers to and hope somebody tests thoroughly.