Took me a long time and many times deleting My eBooks folder. ;-)
My eBooks folder is created by Adobe Acrobat Reader.
Go to >>
C:\Program Files\Adobe\Acrobat 6.0\Reader\Plug_ins
and move the eBook.api file up into the Optional folder.
Or delete the damn thing like I did.
Now delete the My eBooks folder in My Documents and it won't be
recreated
again.