I've read all the forums about uninstalling, using a different browser (tried Explorer, Chrome and Firefox) and no matter what I do (including turning of all firewalls and virus protection), I still get this error message every single time. I'd give up entirely, but I just got a Nook for my birthday and need ADE to transfer library books to it.
This is the error message: E_ADEPT_REQUEST_EXPIRED http://adeactivate.adobe.com/adept/Activate 2010-12-16T21:06:48-08:00%20(1292562408000)%20is%20before%202010-12-16T21:37:19-08:00%20( 1292564239465)
Having the same problem, and my clock on my computer and my kobo are set to the correct time, date, and time zone. I tried support but they couldn't help me...I'm at the end about to take back the kobo I have and the one I bought my mom for Christmas bc this is a nightmare...please help!