1.1.1 Software Updates
A software update is either an update to an application or an update to a driver for a hardware device. WSUS treats any type of update the same way; it defines a software update as update metadata plus the update content. The metadata contains information about other updates that it depends on, rules that define under which conditions the update can be applied to a target computer, information about binary files that are used in the update installation process, and information about how the binary files ought to be applied on the target computer to complete the installation.