I've heard of custom / edited OS'es being a thing, such as Windows Vienna and the not-so-popular WinMac. Out of curiosity, i got myself thinking; Since Windows XP lost support from pretty much everything, is it possible that there is such thing as a Windows XP Windows 7 custom Hybrid OS that combines both Windows 7 and Windows XP? Having the complete interface and interactions as Windows XP, but the same compatibility and usage as Windows 7. Does such OS / VM exist? Or at least in development? Or does one not exist at all?