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A downloaded ebook OK to read on my lap top.
In my e-reader ("Letto") it is registered, but does not open up for reading.
Instead it informs that "a unit authorization is required to read adobe DRM publications.
a box marked "OK" ends the message. Clicking OK takes me back to the library of the reader.
Authorization of my lap top, where I download, has been done. How to authorize a reader for adobe DRM?
[moved from Downloading, Installing, Setting Up to Adobe Digital Editions]