When you activate Adobe Digital Editions 2.0, you receive the error, "E_AUTH_NOT_READY."
This error occurs when the authorization information is damaged. Follow the below steps to rebuild the Activation file.
Disclaimer: The following task requires you to modify the Windows registry. The registry contains system-related information that is critical to your computer and applications. Before you modify the registry, make a backup copy of it. Adobe doesn't provide support for problems that arise from improperly modifying the registry.
For more information about the Windows registry or the Registry Editor, see the Microsoft Help and Support site at http://support.microsoft.com.