With just a handful of keystrokes you can shut down all active apps on your system via Task Manager's Programs tab. Plus: power off your PC by pressing three keys.

When you run apps from the Windows 8 Start Screen and switch to another one, the original app that you were using is not actually closed. Instead this App is left running in the background so that ...

Well, one of the biggest reasons is because of all the startup programs that are running in the background as soon as you start your PC.