New
#31
That doesn't change the fact that you can do a clean installation, skip entering a key and then activate by phone. You have to tell Microsoft that you have a genuine earlier version, so you are entitled to get Windows 10 for free. When skipping the key, there is a risk installing the wrong version (eg Pro while your previous version was Home) and then not being able to activate it. Assuming one knows what he is doing and choses the correct version, he can then call Microsoft and activate by phone. The representative will ask for proof that he has a genuine previous version, hence the need for the earlier key I mentioned.