Error message Error! Check Activation.

[esserino]

I just upgraded to Adobe Digital Editions 4.0.1.101645   on my Windows 8.1 machine. The hardware is ASUS and the antivirus is Kaspersky. McAffee was bundled with the machine, I don't use it, but I don't know if it is completely removed.

I cannot add any new epub ebooks to my Adobe Digital Editions account, and so I can't access the ebooks from my local public library   eBook & Audiobook Collections - eBooks & Audiobooks - Subject Guides at Vancouver Public Library  after upgrading my Adobe Digital Editions as they suggested.

Can I roll it back to 4.0?

Thanks,

Jael

[esserino · Accepted solution]

i fixed the problem by uninstalling ADE 4.0 and downloading ADE 3.0 

It works fine now. on my Windows 8.1 machine.

[Guest]

Uninstalling 4.0 and reinstalling 3.0 worked fine for me about 2 weeks ago. Now, even 3.0 gives me the same error message. I'm at my wits end. How can I fix this? I've uninstalled and reinstalled 3.0 several times, but the problem still exists.

[sequentialz]

excellent - solved my problem! Installed ver.3  - works fine.

[janampandya]

I uninstalled version 4.0 and downloaded 3.0 but it still gives the same error message!

[nicholasg98080213]

this error is a piece of shit, i just want to read my book but this program locks it down so much i am going to look for pirate versions.........