I get this error message
You can authorize this computer only with an ADOBE ID not already used to authorize other computer or device. Try again
You get the error in your eBook Reader or in Digital Edition?
I get the message on the PC I am using to authorize the ereader
a window called Adobe Digital Edition is opening asking me to enter ID Adobe and Password
when I do, I get the error message
Close all applications.
Press WINDOWS + R.
In the Open text box, type regedit and then press Enter. The Registry Editor opens.
In the left pane of the Registry Editor, locate the following registry key: HKEY_CURRENT_USER\Software\Adobe\Adept
Remove the Adept Folder.
In the Confirm Key Delete dialog, click OK.
Close the Registry Editor.
Open Adobe Digital Editions and reauthorize..
Thanks a lot problem solved