Authorized devices situation

With my Nook I loaded Adobe Digital Editions onto my home PC and use that to get titles from the public library, for instance, then use the USB cable to transfer titles to my Nook.

Even if the Nook is not listed it may well work, and the issue seems to be getting the computer authorized first, which has (almost) nothing to do with any devices you may use later.

Two suggestions, the first may resolve the issue, and if not try the second.  Good luck.

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1)

Sometimes ADE gets its registration/activation confused and in a semi-authorized state.

Uninstalling and reinstalling does not help.

Unfortunately, it often then gives misleading error messages about what is wrong.

A common incorrect message informs you that the ID is already in use on another computer and cannot be reused.

It could be that your greyed out registration button is a symptom of this.

This can often be resolved by completely removing any authorization using ctrl-shift-D to the Library screen on ADE (cmd-shift-D if on Mac).

Restart ADE, and then reauthorize with your (old) Adobe ID.

In extreme cases on the mac, the following extra step has helped some people.  Navigate to /Users//Library/Application Support/Adobe/Digital Editions and drag the activation.dat file to the trash. If you are using 10.7, see Access hidden user library files | Mac OS 10.7 Lion. http://forums.adobe.com/thread/1265248?tstart=0

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There are lots of bugs in ADE2.0 (and 2.0.1).  Try replacing ADE2.0 with the older but more reliable v1.7.2.

(You can have them both installed at once if you like.)

One is that 2.0 does not like certain devices and misbehaves in odd ways.

Version 1.7.2, it is a little difficult to find, available on Adobe site for Windows and for Mac.

http://helpx.adobe.com/digital-editions/kb/cant-install-digital-editions.html

The forum software is sometimes corrupting the link above.  There shouldn't be a blank in 'editio ns.html'.  The following redirects to the same page: http://tinyurl.com/diged172

Hi myprincesses,

ADE software does not load onto the Nook.

ADE supports only certain ereaders.  The list of supported devices is located HERE <http://blogs.adobe.com/digitalpublishing/supported-devices>,

and the Nook HD is not listed. 

So, ADE does not support your device and you cannot use ADE to download and transfer ebooks to it.