I have windows 10 and sadly stuck with it unless I restore my PC to factory settings. Now Windows 8.1 was the last stable Windows OS I had (I know many hated windows 8.1 but I loved it) Now I have my main USB Hardrive which contains all of my media, videos, software, etc. I want to put these files needed to install Windows 8.1 (And Windows 8.1 updates if possible) onto this hardrive. I AM NOT GOING TO USE THIS HARDRIVE TO INSTALL WINDOWS 8.1 ON A PC. I am only using the hardrive to backup the files needed to install Windows 8.1. And then later on when I want to install Windows 8.1 I can copy these files from my hardrive to a separate hardrive and use this seperate hardrive to install Windows 8.1. And is it possible to install Windows 8.1 on new PCs that come with Windows 10 or even newer Windows OS in the future? The reason for all of this is to be able to use applications that will no longer work on future Windows OS systems.