I'm trying to deauthorize one of my devices that is currently blocking book downloads onto my Kobo reader. I have three devices in the house - tablet, laptop and PC. The PC is the one I'm trying to deauthorize and I cannot remember the ADE ID or passwor

[waynev70379068]

I'm trying to deauthorize one of three devices in the house.  A tablet, laptop and PC.  The PC is blocking any downloading of books from my library onto my Kobo reader.  I do not remember the ADE ID or the password when the PC was originally authorized a few years ago. How do I deauthorize the PC