Nook Glowlight Error Dialog "User Not Activated"

I have tried all of the above multiple times, including trying versions 2, 3, and 4 on my Windows 8 machine and version 2 on my Mac Snow Leopard. I've unauthorized both the computer(s) and the Nook repeatedly and I've deleted both .adobe-digital-editions and Digital Editions folders from the Nook (repeatedly).

I just did the same thing with customer support from Barnes and Noble.

Is there anything else I can do to resolve this error? If not I will have to return the Nook.

UPDATE: A soft reset of the Nook Glowlight did the trick.

Thank you ShaiShai! I found the installers for ADE 2 and 3 at Adobe Digital Editions downloads I decided to try ADE 3 ( I thought it was unlikely that the issue had been around for a whole version with no comments to be found on the internet about it ). ADE 3 works! I'm very relieved.

This has been driving me nuts for the past week. I have spent way too much time on it. First went to the local Barnes and Noble store, they were stumped, then online chat with tech support tried all of the tricks you mentioned in your post, then talked to tech support on the phone, did everything over again, no surprise, same result. I came to the conclusion on my own that the problem had to be with the new version of ADE. Your post confirms this suspicion. Now I need to figure out where I can get the installer for ADE 2, and whether it will run on Yosemite.