There are many changes to the way Windows Updates are handled in Windows 10.
Note that it's a different behaviour based on whether it's home or pro edition of Windows 10.
You can't choose which updates to install.
If you have an update that keeps failing, you can hide it by running the "Show or hide updates" troubleshooter package
When you are using an Office 365 installation (also knows as Click to Run) of Office 2013 or Office 2016, then the updates will not be offered via Windows Update but will be installed automatically. You can manually check for updates from within any Office application. (source)