In the table below, I've linked directly to the latest Microsoft Office service packs for each version of Office.
As of March 2014, the latest service packs for Microsoft Office suites are Office 2013 SP1, Office 2010 SP2, Office 2007 SP3, Office 2003 SP3, Office XP SP3, and Office 2000 SP3.
Please keep in mind, however, that for most users the easiest way to install the latest Microsoft Office service pack is to run Windows Update.
Download Locations for Microsoft Office Service Packs
|Microsoft Office Version||Service Pack||Size (MB)||Download|
 Microsoft Office 365, the subscription-based version of Office 2013, automatically includes the SP1 updates found in Office 2013.
 Microsoft Office 2013 and 2010 are the only versions of Office available in a 64-bit version.