Just fyi: HEIDOC's ISO downloader has been updated a lot. Your link is still valid, but it isn't version 4.23, but 6.20 (!!!) : Please note it asks you if you want to share unused ressources. That means it creates bitcoins or other stuff. I never activated it, but as you can read from the last sentences from the quote, it seems under some situations those who donate their CPU power get a link faster than those who don't. I haven't had problems with it so far, but you need some MS account for some editions (you have to be signed in to download). EDIT: AFAIK you are able to create a LTSB version out of the Enterprise EVAL version with some kind of "delta patch". But I do not know if this is legal, so i won't write any explanation on that topic. If you are interested in this topic, you may indeed visit MDL, but if those three letters ring a bell, I guess you already know how to proceed.