Recently, Microsoft introduced a new version of their Office Suite which implemented a new file format. In order to open documents saved in the new format, you will need to install a one-time update to your current Microsoft Office suite.
Office documents saved in the new file format will have an “x” appended to the familiar .doc, .xls, .ppt (eg. .docx, .xlsx, .pptx). OIT has made the Office 2003 update available to allow opening these file formats. You may find the file by following the link below.
Microsoft Office 2007 Converter