Use Windows 7, Word 7, Firefox. Tried to delete a file from C:/ file. When I closed the screen, most desktop icons were "Word's" icons (still have the original name underneath icon). When you try to open one, you get a pop-up saying "file conversion - firefox - select the encoding that make the document readable".
I looked at the Default Program list and chose Firefox to use to open all files - but nothing changed. What now? Help & Thanks.