There is, however, a significant visual change from Windows 7 and Vista. The Desktop no longer uses the Aero interface, along with its transparency, animations and other visual effects and graphics-intensive traits. Instead, windows are now flatter and with simpler colors.
You can't run the new Windows 8 apps from the Desktop. You'll have to either go back to the Start screen (press the Windows key) and click their tiles, or else use the Search charm: Run the Search charm, type the app's name, and then click the icon when it appears. ( Complete instructions below.)
Typically, when you install Desktop applications, they show up both as icons on the Desktop and as tiles on the Start screen, so you can launch them from both locations. Some system utilities and other Desktop apps don't appear as icons on the Desktop by default; you can use the Search charm to search for and launch them.
This handy menu provides takes you to a plethora of power user tools. Click to view larger image.
The lack of a Start button makes the Desktop annoying to use, but it does offer one useful trick: Right-click in the lower-left portion of the screen (or press the Windows key + X), and a menu pops up that gives you access to the Control Panel, File Explorer (called Windows Explorer in previous versions of Windows), the Task Manager, the command prompt and a variety of other administrative and power user tools. (You can also bring up this power tools menu from the Start screen using the same methods.)
Introducing the Charms bar
The new Charms bar offers quick access to several powerful tools for navigating and working with Windows 8. When you move the mouse to the upper-right or lower-right corner of the screen to make the Charms bar appear, its icons aren't labeled, so at first it's not clear what they do. As you move your mouse toward them, though, the full Charms bar appears with labeled, easy-to-see icons on a black vertical bar.