One important note to choose x86 or 圆4 versions of Microsoft Office 2013 for Office users is previously installed Office products require the same product architecture family for new Office 2013 Preview applications too. This Microsoft TechNet page will not only provide you required activation keys (Office 2013 product key) but also links to 32 bit and 64 bit binaries of Microsoft Office 2013 Professional Plus setup files. Then you will be redirected to TechNet Product Key Distribution for Office 2013 pages.
If you follow this download link, it will request you to login with your Passport account.
