You get the free Office Starter 2010, so there is no serial number key.
Last week i bought a new Dell Inspiron N5110 . It came with Windows 7 Home premium OS and a lot of other softwares.But yesterday my harddisk got corrupted and i had to format the system using the backup cd i got with the system.I downloaded some softwares from " My Dell Downloads". But i didnt't got  the Microsoft Office 2010 which came with the computer at the time of buying.I did't got any Cd or serial key of this Microsoft Office 2010.What should i do to get this Genuine Microsoft Office package. Pls help me:emotion-1: 
lost my Microsoft Office which came with my OEM OS.