I borrowed an ebook from the library and downloaded it to a fresh copy of Adobe Digital Editions. I did enter an Adobe ID login, and opted for anonymous mode to read the book. After a couple days, I authorized that computer with an Adobe ID so that I could read it on another computer, but that deauthorized the ebook.
I can no longer read the ebook, and deauthorizing to return to anonymous mode also didn't help. Is there anything else I can do?