1 Reply Latest reply on Jan 7, 2016 12:55 PM by cselhost

    error message question


      I have Adobe Digital Editions 4.5 installed on my Windows 7 PC.  However, when I download and try to open .acsm files within Digital Editions, to then transfer to my Nook ereader (from Overdrive -  library books that I borrow), I always get an error message that reads "Error! Check activation"


      I have no idea what this means and have asked in a support chat.  The chat operator directed me here.


      Any help is greatly appreciated.


      Thank you.

        • 1. Re: error message question
          cselhost Level 2

          Hi Anamchara,


          There is something wrong with your activation file and you need to manually delete it and then reactive 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:


          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.