Jim,
Thanks for your response. I am still a bit confused over whether I should authorize my ADE installation. Let me post the exact sequenxe of events, so that you can tell me if it is safe to do so (without losing my e-book).
Here is what happened:
I have a laptop and a desktop PC. I also have one AdobeID.
1. I bought an e-book. On my laptop, following the link from the publisher, I downloaded a PDF e-book file, opening which led me to the web page with the ADE installer (http://www.adobe.com/products/digitaleditions/?source=acrofile).
2. I installed ADE on this laptop but chose to not use an Adobe ID. The ADE on this laptop opens the e-book just fine.
3. Wanting to use the e-book on my desktop PC, I installed ADE on my desktop. This time, I used my AdobeID while installing ADE (on the desktop).
4. I copied the PDF file (that I downloaded in step 1) from my laptop to my desktop. The ADE on this desktop PC will not open the PDF. It gives me an error "Document is licensed for a different user account".
Having done all this, can I go back to my laptop and authorize that installation of ADE with my AdobeID without losing the e-book? I don't want to mess up my laptop which has a functional ADE, albeit with local authorization (no AdobeID) only.
Will that e-book, having run on ADE with local authorization, get licensed to my AdobeID and work on other devices (like my desktop PC) that have ADE associated with my AdobeID?
Thanks.
Aloke