I still haven't found my resolution. It is noted that in File Explorer, I can no longer preview pdf files in the navigation pane, though Word documents ARE able to be previewed. This also affects my ability to print, as I use to be able to select multiple pdf files and send to the printer. PDF files dno longer work this way, though it WILL work that way with Word. I did not download or isntall any new Adobe version, and this has been going on for several months. I did try opening pdf files with Abobe vs. the one with REader - AND just tried to do this setting( Go to Edit > Preferences > Enhanced Security > Uncheck 'Enable Protected mode at start up' Turn off the protected mode and uncheck Enhanced Security >) Unsuccessful. 😞
... View more