This is the original RTM Windows 7 x64 ISO image with ONE SLIGHT modification. The file named "ei.cfg" has been removed from the "sources" folder and the image saved using PowerISO software. This allow this install DVD image to load any one of the four following editions of Windows 7 in the X64 version. Edition: 1. Windows 7 Home Starter X64 2. Windows 7 Home Basic X64 3. Windows 7 Home Premium X64 4. Windows 7 Professional X64 5. Windows 7 Ultimate X64 During the boot install process a window will pop-up showing the four versions available for installation. Select the one you want to install with your mouses cursor and then click "Okay". The install process will then proceed as normal. One may now have the ability to install four different editions of Windows 7 using a single DVD disc. YOU STILL MUST HAVE A MICROSOFT WINDOWS 7 GENUINE PRODUCT KEY FOR THE EDITION YOU WANT TO ACTIVATE. NO KEYS ARE PROVIDED.