Error when trying to open a .docx file

When trying to open a .DOCX file in Word 2013 I receive the following error message:

“there was an error opening the file.”

What can be causing this to happen?

Try these options:

  1. Move the file to another location and reopen it.
  2. Unblock the file by its security setting.
  3. Repair MS Office program from control panel.

Read info on Microsoft community http://community.office365.com/en-us/f/172/t/269739.aspx