WSUS Approval Deadlines

WSUS has this feature called "deadlines" in the approval dialog, and if you don't enable it, your updates might never be installed. That's because users can just not hit the button to start the installation (why would I want to update and restart when I'm in the middle of working?). The deadline causes the clients to start installing the update at that time no matter what the user says. Similar things can be done with the Group Policy setting that schedules update installation.