We open PDF files on mapped network drives, using FDF forms with fields. The latest Windows Update (12/15/14) KB2310138 is now causing the Adobe Reader application to say "Access Denied". I know it is the update for sure. I have one computer WITH the update that gets the error, another without that doesn't. If I change the "/F" reference in the FDF to use a local "C:" copy of the PDF, there is no error message.
Cannot undo the Windows Update. Although it shows on the history list, when I go into "Installed Updates" to undo it, it is not listed there.
Are you still facing this issue?