unable to unauthorize/reauthorize computer to ade. error message given repeatedly while ade help says already authorized

Hi Skayengstrom,

You might need to manually deactivate ADE. Please follow these instructions:

You need to delete out a few registry keys to clear the activation for ADE. You must have administration authority.

On Windows it can be found here:
Open Windows Registry by using the command prompt and typing 'regedit' or by opening the start menu and searching for 'regedit'.

Search for the following folder:
HKEY_CURRENT_USER\Software\Adobe\Adept\Activation

The 'Activation' folder can be entirely deleted.

On Mac it can be found here:
In Finder, find the 'Go' option on the menu bar and click 'Go to folder' and type the following in:

~/Library/Application Support/Adobe/Digital Editions/

Delete the activation.dat file within the 'Digital Editions' folder.

Restart ADE and it should be deactivated at this point. You should be good to sign back in.

Please check and see if E_ADEPT_INTERNAL is resolved now as well. It's likely that this error might still persist, however it indicates an issue with the ACS server and not ADE. You would need to contact the vendor that you're trying to buy the book from.