iPower is a little app that runs in your system tray allowing you to instantly logoff, reboot, or shutdown your computer. From the right-click menu, you choose what you want the default action to be (after installation, it’s set to “shutdown”). After it’s configured, you only need to double-click on the icon to have it perform your preferred action. This is a pretty quick way to do a shutdown, but be careful not to click it when you meant to click on another system tray app like your anti-virus or your Wi-Fi connection! You may prefer going with a Vista sidebar widget instead (like this one) – it’s just as fast and not as easy to accidentally click.