19 Replies Latest reply on Feb 21, 2015 6:15 AM by giorgios22112211

    "Error! Check activation"... What should I do?

    nuritn12355948

      I just bought my first epub book from Guilford Press and downloaded ADE for it. However, it won't let me read the book, and only says: "Error! Check activation". What should I do? I am using a regular PC.