Windows 7 running Office 2013. Mature installation no recent changes.
Simple update to ppt file created in 2003 ( using Compatibility mode). Single user edit saving to my documents
Error Message "We're sorry something went wrong that might make PowerPoint Unstable" / "Please save your presentations and restart PowerPoint"
PowerPoint no longer allows me to save any file in any format without this message.
Actions taken : Restart PowerPoint / Reboots / Deletion of temporary files from C:/Windows/Temp
Problem persists