My Microsoft Word 2007 SP3 installation has started to act very strange. When I open Word and select "Open", "Save" and "Save As" from the menu options the machine gives the sound of an error but does not display any text and the "Open", "Save" and "Save As" dialog box will not come up so I can select a file to open or save or save an existing file. If double click an existing word document from "My Documents" the document will open but still the same three dialog boxes, "Open", "Save" and "Save As" not open. Excel and PowerPoint and Access work with a problem just Word. I tried to repair installation but no joy.There are no errors in the error logs when I attempt this.

I really do not want to re-install Office 2007 on the machine if I do not need to to. Any ideas?

Microsoft Office 2007

Windows XP SP3

Dell Latitude E5420