This sounds like a procedural problem. You don't download DE to your Nook.
You go to B&N's website and register it with them, using your DE user name
and password. Then you attach it to your PC, bring up DE on your PC, and DE
should do the rest. In broader terms, DE is doing the heavy lifting here -
and the Nook gets only the ebook itself in the proper format so its own
software can interact with you as you read the ebook.
The other half is how to transfer ebooks from the library via DE to your
Kook. The library should have a set of instructions on how to do this. It
should be relatively straightforward.
Hope this helps!
Re:"system does not meet the minimum system requirements" .