I downloaded an epub file library book to Adobe Digital Editions I try to transfer them to my Nook but get the message E_ACT_TOO_MANY_ACTIVATIONS how can I fix this? I tried to downloading different books same result each time. (I have never had this problem in the past either.) I tried down taking ADE off and back on but I get the same result?i I'm running windows 8.1 ( in case that matters) Help Appreciated!