In 2003 I purchased a laptop and installed Microsoft Office 2003 using a disk and the numerical key. I should note that I no longer have that disk but I still had the numerical key. In 2013 Microsoft had a special offer to upgrade to Office 2010 using a download from their website and using a new numerical key. I have now purchased a new computer (and will be scrapping the old computer ) and would like to bring this Microsoft office 2010 from the old laptop to the new one. Since I no longer have the original disk can I just download the file from the Microsoft website? If I can which numerical key should I try to use?