Sure, they have a “postpone” button that pops up, but that does little good if you happen to step away from your computer when it pops up to inform you it’s about to restart. There are few more annoying default settings than Windows’ developers choosing to have the default on Windows Update be to automatically restart your computer and further not providing any obvious way to disable auto-restarts after a Windows update. You should know how to prevent Windows Update from automatically restarting your computer.