2 Replies Latest reply on May 23, 2016 4:10 PM by kristens93382128

    Activation Error


      I have downloaded an e-book from Harper-Collins but, when I try to read it, I get this message: Error! Check Activation.


      What does that mean?@

        • 1. Re: Activation Error
          cselhost Level 2

          Hi Magister,


          You need to manually delete the activation file and then resign in. Please follow these steps:


          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:


          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.

          1 person found this helpful
          • 2. Re: Activation Error

            Thank you!!  I had the exact same problem and this solved it!!  I had to re-authorize my computer, but now it works! THANKS AGAIN!