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Microsoft Office 2013 Service Pack 1 (SP1) provides the latest updates for Office 2013. This service pack includes two kinds of fixes:
- Previously unreleased fixes that are included in this service pack. In addition to general product fixes, these fixes include improvements in stability, performance, and security.
- All the monthly security updates that were released through January 2014, and all the Cumulative Updates that were released through December 2013.
How to determine whether you have SP1 installed
In order to determine whether SP1 is already installed, you can look for the program version in the list of installed programs in the Programs and Features item in Control Panel.
If SP1 is installed, the version will be 15.0.4569.1506 or later.
In this case, vesion number 15.0.4420.1017 means you need upgrade Office 2013 to Service Packs 1.