I downloaded the 792meg Office 2013 update .EXE (shown below) I installed the update, rebooted as required. I go to Windows Update and it wants to download an additional 600+ megs. Why? Is Windows Update unable to determine that the KB is already installed? This has happened on more than one machine of mine. proplussp2013-kb2817430-fullfile-x64-en-us.exe
This may be due to the fact that you have language packs or other additional packages installed for your Office 2013; those are not covered by the default ProPlus SP1 setup file you installed.