Shut down may refer to any of the following:
1. Shut down is a term used to describe the process of closing all software programs in preparation to turn off a computer's power. The operating system is the last program to be close, and it is highly recommended that all computers be properly shut down before being turned off to help prevent data corruption. The picture shows an examples of different shut down screens. In the to picture, Windows 7 displays a shutting down message and when done should turn off the computer. In the bottom picture, not all early computers were capable of turning themselves off, so Windows 98 displays a message when it was safe to turn off your computer.