It is not unusual for updates to be delivered in batches numbering in the many dozens. By default all updates are selected to be installed and there is a install all button provided.

There are a number of reasons why a user may wish to delay or not install a specific update or conversely only install 1 or 2 updates first or 1 or 2 updates at all. At the moment, to achieve the later case requires deselecting many entries which is a PITA.

A simple toggle switch select all/deselect all would resolve this problem quite nicely.