We don't need to worry if we receive a MS Office 2007 document and MS Office 2007 is not installed on our PC. It is easy to convert latest document format of MS Office 2007 to other formats like MS Office 2003, Office XP and Office 2003 with the help of free tools and online services.
If you have MS Office 2003 or any earlier version installed, you can download Microsoft Office File Format Converter to open, edit, and save files using the file formats new to Word, Excel, and Powerboat 2007.
Alternatively, you can convert new format files to old format online using the free Lamar, docx2doc or doc-converter service. Unlike the Microsoft Office File Format Converter tool, these conversion services do not require copy of Microsoft Office.