I saw someone asked me about how to create Windows 8.1 ISO file and because I already recorded my older video, updating Win 8 to 8.1 that you can watch and read in this post, I tried that method again to create an ISO file, and it didn’t work. (I already updated that post, and it should work again.)
So because I am a typical of person who gets more curious after trying something which doesn’t work, I tried and tried again, also looking for some good resources on the internet, I finally was able to create the Windows 8.1 ISO files using this method.
Basically, all what you need is the 2 set up files for Win 8 and 8.1 (they’re in exe formats) that you can download from Microsoft website, and your Windows 8 key. The Win 8 product key has to be the valid one.