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Office 2013 Service Pack 1 for Microsoft Office 2013 32-bit Edition contains all the updates that will improve the safety, performance, and stability of your Microsoft Office 2013 Suite.
This update will include all of the updates previously released for Office 2013. To be sure that you are getting the most out of your version of Microsoft's office suite, it is recommended that you install Office 2013 Service Pack 1 as an essential upgrade.