Cannot authorize computer in ADE

[cynthial80476572]

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?

[Nanaky]

    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..