What is an ISO / DMG disc image?

An ISO or DMG disc image is an archive file of an exact optical disc. The disc image contains every written sector of an optical disc including the file system. ISO are often use in PC or Windows Operating system and DMG are commonly used in Mac. Is Windows Vista upgradable to Windows 7, 8 or 10? It is very possible to upgrade

Windows Vista to later Microsoft Windows editions. Although this will require “Clean” or “Parallel Installation” then selecting Custom-Install process. Please refer to your machines hardware specification.