Error code E_ADEPT_UNKNOWN

[patj75498351]

Using Adobe Digital Editions I am unable to download books. I keep getting the error code E_ADEPT_UNKNOWN. I have tried downloading using Internet Explorer and Google Chrome. Does anyone have a solution?

[Nanaky]

Get you the error when try to open the eBook or Download?

[patj75498351]

I cannot download the book.It looks as if it is in my Adobe Digital Editions account, but when I click to open on my computer it says "unable to download. Licence service communication problem".

I tried to transfer the supposedly downloaded book to my eReader, and when I click on it it says "Oops! This document couldn't be opened.. protected by ADRM".

[Nanaky]

Do you used Windows or Macintosh?

[patj75498351]

I use Windows 7

[Nanaky]

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.

[patj75498351]

I solved the problem yesterday  myself by unauthorizing ADE from my desktop computer (which runs Windows 7), uninstalling ADE, and installing it on my laptop, which runs WIndows 8.1. I had no problems downloading my books on the laptop. After spending at least 10 hours on this problem I am not going to load ADE on my desktop computer again and try your fix - this has been way too frustrating.

[Nanaky]

The error seems only on the Desktop device.