I have a 9 month old Dell with Windows Vista Basic 32 bit installed from the factory. I need to get this machine to Windows 7 Professional 32 bit (Ultimate may work as well). I have two OEM disks from Dell: Vista Business 32 bit and Windows 7 Professional 32 bit. I want to avoid reinstalling the applications currently on this machine so I need to do an upgrade. My understanding is that I cannot go directly to Windows 7 Professional from Vista Basic. Since the Anytime Upgrade option for Vista Basic to Vista Business is no longer available, I tried using the Dell OEM Vista Business disk to upgrade Vista Basic to Business so I could then go to Windows 7 Professional, but it would only allow the Custom (overwrite) install. Is it possible to modify my Dell OEM Windows 7 Professional disk to become a Dell OEM Windows 7 Ultimate disk or a Dell OEM Windows 7 Home disk and then use that disk to do an upgrade? These are legitimate upgrade paths according to Microsoft. Since I have Dell disks and the machine is a recent Dell that almost certainly has the correct BIOS, I am hoping not to to need to install other tools such as a loader. Is there a way to do this? What are my alternatives?