- Close all applications.
- Choose Start > Run.
- 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
- Select the Adept key.
- Choose File > Export.
- In the Export Registry File dialog box, select Selected Branch under Export Range. Enter a name and location for the backup registry key, and then click Save.
- Right-click the Adept key and choose Delete.
- In the Confirm Key Delete dialog, click OK.
- Close the Registry Editor.
- Open Adobe Digital Editions and reauthorize.
maybe I should have added that I have windows 10. I saw nothing after trying different ways anything related to the answer above. After clicking on run the Adobe Digital Edition 4 opened up and prompted me for the ID and password. I got an error message saying I needed a vendor ID. There was no place to insert one and I didn't have one anyway as I downloaded from the Adobe site. This is very frustrating as I have been using Adobe Digital Editions for over 5 years. Now for reasons unknown I can't use the former Adobe Digital on my other computer.
If you has a Adobe ID you should choose as Verdor ID Adobe ID and then you Login Data. Which error message get you exactly when you enter this Data?