Office 2007 OEM (Original Equipment Manufacturer)/ Retail Version
Your computer was pre-installed with a version of Microsoft Office 2007. Should you ever need to reinstall your version of Office, the fastest and easiest way is via a backup copy. You can obtain a backup copy now.
http://www.microsoft.com/office/backup2007/en-us/default.mspx
Office 2010 PKC (Product Key Card – previously called OEM)/ FPP (Fully Packaged Product previously called Retail) Version
If you need to reinstall your preloaded Microsoft Office 2010 software, you can do so from this site. To download or order a backup DVD you will be required to provide a valid Office 2010 Product Key.