1.Close all open copies of Word.
2.Open Word.
3.Click on the round Office button in the upper-left corner of the window.
4.Click Open.
5.Select Templates in the Favorite Links pane.
6.Select Normal.dotm or Normal.dotx. This should become your open document.
7.Now delete all the text in the document, including text in any headers and footers. Pressing CTRL/A followed by the Delete key is the fastest way to do this.
8.Save the file with CTRL/S. You may get a warning message about the Global template having been changed. This is OK. Click Yes.
9.Close Word.

Word sometimes leaves the last directory used incorrectly set, so the next time you open or save (especially!) a file, be careful that Word's pointed at the right place.

Hope that helps.