EDIT: If you want to get a free version of Windows don't bother with this. Just install Pro, and then enter ServerRdsh product key. Book activated. @xinso said that Starter is automatically activated for free so it is very useful. They explained how to convert another edition to Starter and activate it, which works. But I want to clean install, not add certificates and change the key of Home. I tried to add an ei.cfg and PID.txt in 16299 but it just says that the product key doesn't match any available editions. This used to work in 15025 (but I don't think it did in any later builds). How do I switch the edition, key, and certificates of the ISO/WIM, or "unlock" the Starter edition in it? Sorry if this is a noob question.