"Your changes could not be saved to "file name" because of a sharing violation. Try saving to a different name."
If I do save the file to a different name I get the same message. If I ask for help the massage is
"When saving a file, a sharing violation can be caused by the way an antivirus application interacts with Microsoft Office.
Check with your antivirus provider to make sure that the current version of the application, including updates, is installed. The antivirus provider might also have information or solutions for sharing violation issues."
My antivirus is Symantec Enterprise and is up to date.
I don't have the same problem with WORD