I just borrowed a book from my library and I can't seem to download it to my computer. I am trying to download an epub copy and I get "Check Activation" when I try to open with Digital Editions. I can read the book in my browser. I recently moved my computer - that is I put my disk drive with all of my data and apps into another computer. Do I need to reauthorize Digital Editions for this computer? I can start up Digital Editions with no problem but I can't return or download books. Another piece of information, perhaps unrelated, is that when I try to return an item that I have checked out a book, it says "Unable to return - Authorize your computer first".