Improvement that are offered by this SP1:
Improves compatibility with Windows 8.1.
Improves compatibility with Internet Explorer 11.
Improves compatibility with modern hardware, such as high-DPI devices and the precision touchpad.
Provides new apps for Office capabilities and APIs for third-party developers.
All volume editions of Office 2013 client products are pre-installed with a Generic Volume License Key (GVLK) key, which supports automatic activation for both KMS and Active Directory-Based Activation, so you will not need to install a product key.
Part 1
Part 2
Part 3
Part 4
