I am running Windows 7. I have an early Nook color tablet for reading ebooks from the library; an EPUB file is loaded to Digital Editions and then I transfer it to the Nook. Recently, some file appears to have been corrupted and the download to DE does not complete. Here is the screen with the error message. Things I have tried: I have deleted and reinstalled DE, I have done this several times and done it with both the current DE and the older ver. 1.72. I have located the overdrive file that appears in the error message and then downloading it again from the library. The Nook is fine with ebook downloads from Barnes & Noble and for digital magazine subscriptions. The only problem is with getting the Overdrive download from the library EPUB files. Any suggestions?