If you need to close multiple applications and windows at once, then it will definitely be time consuming. Try Close All Windows, it is a light-weight tool which closes all open windows simultaneously with a single click.This tool was originally developed back in 2006 for Windows XP only. But why not give it a shot on Windows 7 as well? This tool has no interface, just run it and it will close all windows instantly. To make things easier, pin it...