A Word document suddenly changes into a 'read only' file which cannot be saved or deleted. I have 'saved' under different file names as instructed, but as a result I now have 10 versions of the document, 9 of which I don't want! The 'Help' file says go to 'Properties' and untick the 'read only' box. The boxes aren't ticked, so I still cannot delete. How do I delete these files?