It seems that these types of errors come in bunches to the Forum.....
This is the text from ADE HELP (which you can review using the F1 key from
Library or Reading view):
"Activation and authorization
After installation, the Setup Assistant wizard prompts you to activate
Adobe Digital Editions (you must be online during this process). During
activation, you have the option to authorize your computer with an Adobe
ID. If you don't have an Adobe ID, creating one is free and only takes a
minute. The Adobe ID enables you to transfer items protected by digital
rights management (DRM) between multiple computers or devices and restore
them after a data loss or system reinstallation.
An Adobe ID also includes an Adobe membership, which gives you access to
trial downloads, hundreds of free product extensions, and special community
areas. It also allows you to view and manage your activity in the Adobe
Adobe strongly recommends that you authorize your computer at initial
activation to protect your digital content. If you choose to authorize at a
later time, you can do so by choosing Library > Authorize Computer.
After activation, any books, magazines, or other documents you previously
bought with Adobe Acrobat® or Reader® software are migrated to Adobe
Digital Editions. This is usually a relatively quick process. Adobe Digital
Editions opens each item and reverifies its license to the user. If you
don't have DRM-protected items, you don't need to be online during the
migration. If you have a large number of items (for example, more than
100), then this process may take a while, but you will see a progress bar
indicating the state of the migration as it proceeds.
Note: Items that you previously borrowed from a public library with Adobe
Acrobat® or Reader® software are not migrated to Adobe Digital Editions.
You need to return the library item and then borrow the item again with
Adobe Digital Editions then does some housekeeping (setting up the manifest
and application shortcuts) and launches."
Translation: when you download and install ADE, you should have an Adobe
ID that you got when you registered with Adobe, and you should use that ID
during the activation process. If you did not have an Adobe ID, then you
could fix that by going to Adobe and registering during the installation
process. If you've done that, then ADE should be on autopilot.
You mentioned a message. I'd bet the message says something like
E_ADEPT_REQUEST_EXPIRED. That message means your computer's time, date and
time zone are not in agreement with Adobe's record of your computer. Check
that information and MAKE SURE that they are correct. If the message
persists, that can mean your attempt at installing Digital Editions has
passed its 'good until' time and/or date, and you might be better off to