I couldn't open library books. The error message was that the book was protected - it's a library book. It was working fine. I unauthorized and reauthorized. That didn't work. I deleted my adobe and tried a different version.

[julias72372085]

I can't open my library books.  I checked the forum and it was suggested that I unauthorize and reauthorize.  I did that - I still got the error message that the content was protected by Adobe - I deleted my adobe program and opened a different version, 3.0, that didn't work either.  Now I have a new message - check activation.  I can't even download books.  I am getting pretty disgusted.  Getting help is ridiculous - I would rather pay for a service and get some service than go through this.

[Nanaky]

Macintosh:

1. quit Adobe Digital Editions.
2. 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 library files | Mac OS 10.7 and later.
3. Open Adobe Digital Editions and reauthorize.

Windows:

1. Close all applications.
2. Choose Start > Run.
3. In the Open text box, type regedit and then press Enter. The Registry Editor opens.
4. In the left pane of the Registry Editor, locate the following registry key: HKEY_CURRENT_USER\Software\Adobe\Adept
5. Select the Adept key.
6. Choose File > Export.
7. In the Export Registry File dialog box, select Selected Branch under Export Range. Enter a name and location for the backup registry key, and then click Save.
8. Right-click the Adept key and choose Delete.
9. In the Confirm Key Delete dialog, click OK.
10. Close the Registry Editor.
11. Open Adobe Digital Editions and reauthorize.