This might not work... but then again it might...
In the folder within the folders (with the word documents in), could you do the following:
1. Right click on one of the word documents
2. Hover over Open With
3. From the bottom of the drop down list select Choose Program...
4. In the window which appears, choose Microsoft Office Word (whichever one your one is)
5. Check the box Always use the selected program to open this kind of file
6. Press OK
then try again... does it work now?