The other possibility is that the computer you are trying to open it with cant open it because it is not converted. This happens all the time when an office 2003 tries to open 2007 or 2013 without a converter pack. What is the file extension of the file you are trying to open and although I see on your stats that you are using office 2010 I was hoping that maybe you were trying to open it with 2003 (wishful thinking)