Microsoft has released Service Pack 1 for Office 2013 suite. SP1 for Office 2013 comes with quite a few updates to improve security, stability and performance of each product in the suite. The service pack includes product updates and hotfixes all the way from the initial release of Office 2013 until now (From December 2012 to January 2014).
Some of the new features, enhancements and fixes include the following:
Enhanced compatibility with Windows 8.1 and Internet Explorer 11
New apps for Office capabilities and APIs for developers
New OneDrive for Business replaces SkyDrive Pro
Enhancement to Click to Run virtualization technology which installs and updates Office 365 application on the local computer
Power Map for Excel, a 3D visualization technology for mapping, exploring and interacting with temporal data is now available to Office 365 users
If you are an Office 365 user, you will be using the latest version of Office 2013 apps by default. There is no need to update. But the Desktop users will need to download and install the Service Pack 1 either by downloading it through Windows Update (KB2850036) or by downloading it from the direct download links below.
The current version of Office 2013 is 15.0.4420.1017. And after installing Office 2013 SP1, the version will become 15.0.4569.1506 or higher. You may see these version numbers in the Programs and Features control panel app.
SP1 for Office 2013 is available for both 32-bit and 64-bit editions. You will need to select the language and click the download link to download the service pack 1 for each app