I am suddenly unable to open some of my older Word files (say, a couple years or older). I get an error message that says "Word cannot open the document: user does not have access privileges." It is my computer, I am the administrator user, and there have never been any other users registered on the computer than me. Some of the files which I am now unable to open I have been able to open as recently as a few months ago, although they were created several years ago. Files that have been more recently created will open normally. Does anyone know why this would be and how i fix it? Thank you!

BTW, I have Office Starter 2010, Windows 7.