I have used Adobe Digital Editions for years without a problem. I started having difficulty with it when I switched to a computer running Windows 10. Now I get an activation error when I download an EPUB ebook. Following a suggestion on the Adobe website, I tried to de-authorize and then re-authorize the computer. The de-authorization worked, but when I tried to auyhorize the computer again, the option was grayed out and I could not. I then uninstalled and reinstalled ADE,then tried the authorization again. It was still grayed out. Any suggestions?
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..