I've just bought a nook ebook which is DRM protected. I am trying to download it to my computer using Adobe Digitial Editions. It asks for an unlock code. I don't have such a code. My device is authorized to my computer and I'm using ADE just fine with books from kobo which are not DRM protected. What's going on? Thanks
If the book is PASSHASH enabled then it will prompt for Unlock Code. Please check with your distributor and get the login credentials to unlock.
For more information on PASSHASH refer to, Public Knowledge Base
Hope this solves your problem.