Error when activating Digital Editions or reading EPUBs

When you activate Adobe Digital Editions 1.x or read EPUBs, you receive the following error:


Solution: Update the machine's time and date

Make sure that the machine's system time, date, and time zone match the time/date/zone when you purchased the PDF or EPUB.

Additional information

When you download a PDF or EPUB, the Adobe activation records timestamp information from the Adobe activation server. This information is stored inside the book. When you attempt to open the book, this information is compared to your current system information. If your system has an incorrect time/date/time zone, then the activation server disallows the request and you cannot read the book.

One of the following system settings (or a combination of them) causes this error:

  • Incorrect clock time
  • Incorrect date
  • Incorrect time zone

This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported License  Twitter™ and Facebook posts are not covered under the terms of Creative Commons.

Legal Notices   |   Online Privacy Policy