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Last Updated: May 24, 2012  |  2602 Views

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This error message occurs when you initially download an ebook to a computer or device not authorized with an Adobe ID. If you then authorize the device after downloading the book, you will get this error message when you try to open the book or download it again.

This error message can also happen when you download a book on a device authorized with a particular Adobe ID, but then try to download the same title on another device with a different Adobe ID.

If your ebook was downloaded before you authorized your device, or if the book was downloaded on a device with a different Adobe ID, you won't be able to read this book. You'll need to return it and place it on hold again.

You will need to de-authorize and then re-authorize all of your devices to the same Adobe ID.

Please follow these instructions carefully in the order they are listed.

Create an Adobe ID here. You may want to write down the email address and password you use.  If you think that you may already have created an Adobe ID, try logging into  If this works, this is your Adobe ID.  If you are authorizing your Nook, use the same email address you used to register your Nook at Barnes & Noble.

Deauthorize your reader

1. Plug your reader into your computer with the USB cable

2. Open Adobe Digital Editions

3. Make sure you can see your reader displayed at the bottom of the left on the left-hand side of the screen

4. Press <CTRL>+<SHIFT>+<E>

5. Select your reader from the drop-down list and then click Deauthorize

6. Unplug your reader from the computer

Deauthorize your computer

1. Open Adobe Digital Editions

2. Press <CTRL>+<SHIFT>+<D>

  • Deauthorize Computer box will appear and say, "Are you sure you want to deauthorize this computer? If you have protected items in your Digital Editions library, they may no longer be readable."
  • Select Deauthorize
  • After selecting "Deauthorize" a message will appear stating "Your computer was successfully deauthorized. Restarting Adobe Editions will require you to reactivate your computer."
  • Click on "Quit"

3. Adobe Editions will close.

Reauthorize your computer

1. Open Adobe Digital Editions

2. The Setup Assistant will appear, click "Continue" and then authorize/activate the computer with a new Adobe ID and password (that you created in the first step).

3. Close Adobe Digital Editions

Reauthorize your reader

1. Plug your reader into your computer

2. *If you are using a NOOK, be sure to delete the file called .adobe digital editions from your NOOK (using your computer) before continuing.*

3. Open Adobe Digital Editions

4. Adobe Digital Editions should detect your device and offer to authorize it with your Adobe ID.

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