Have you checked the documents' properties? Perhaps all your documents are
read-only, for some reason. If not, here is how to do it. In Windows
Explorer or My Computer, right-click on the file name of the document.
Choose "properties." A little window will open. It should open to the
General tab, but if it doesn't, then choose the General tab. At the
bottom, look to see if the "read-only" box is checked. If it's checked,
then uncheck it.
If this is the problem, then check to see if your normal.dot is also
read-only, and if so, change it.