Windows Vista was not everyone’s favorite operating system. Most people have upgraded from it to Windows 7 or later releases, but have you wondered how Vista would run on the iPhone 7? Hacking Jules has shared a video that shows just that. You will just have to use Bochs for iOS to get it done.
As you may have guessed, running Windows on iOS devices is not without issues. For instance, the emulator can only show 16 colors, so Windows doesn’t look proper. You will still be able to open basic apps and interact with menus on your iPhone though.[Source]