2.8.2 Non-Timer Events
When a system shutdown event occurs:
The Print Services system closes all open handles to remote objects.
The Print Services system unregisters endpoints.
When a local Plug and Play event occurs:
When new printer hardware is detected on a local port of a computer that acts as print server, the Print Services system automatically locates a matching driver for the detected printer and installs a print queue. The created print queue can optionally be set up as a shared print queue depending on policy setting.