I have seen that others have asked about this and have not received an answer that works. So I'm not holding my breath on doing so again, but maybe if I phrase it in a different way...
I have the most recent download of Adobe Digital Editions for Windows available online. I have a PC and I use Windows 10. I have Norton Anti virus 360 on my system.
I have a library book I want to put into ADE so I can then download it to my Kobo, but each time I try to do this, even manually, I get the error message above.
I did some research and if I understand correctly, activation is NOT the same as authorizing the computer. The authorization is fine and I have an Adobe ID # showing up. I have read that this has something to do with my firewall blocking me adding the books. I saw instructions somewhere telling me to go to Control panel and firewall security and try to select the ADE program as an "exception " or add it as a permitted program, but when I go to my control panel and firewall info it looks very confusing and only allows me to "change rules" to allow other computers, which is not the same thing, I don't think. And I wonder if having Norton Anti-virus is the issue...maybe it's blocking me from adding books? But I have no idea how to make this happen and I'm getting increasingly frustrated. I just want to read my ebook on my Kobo...this should not be so difficult when I have all the programs correctly installed, so what is blocking the ebook transfer? No-one has figured this out?