Have you ever needed a tool that would Close all running Windows applications with a single click? Well, your in luck. Close All Windows is a Free Portable utility that enables users to close all your active applications that are currently running in Windows at once. It uses no system resources because it simply sends a signal to close all open windows and then closes itself. A hot key may also be mapped, allowing for easy access to the application and it’s closing feature.
Close all running applications, Close All Windows:
Authors Website: http://www.ntwind.com/software/utilities/close-all.html
Stealth: No (writes to Windows Registry)
How to install Close All Windows to a USB flash drive: