1. Click the application buttons on the Taskbar found on the bottom of the screen.
2. Tap [Alt] + [Tab] to bring up a pop-up Task Switcher window that displays thumbnails of your open applications.
3. If you have Windows Vista and a new high-end graphics card, you can use the new Aero Flip 3D experience. This will display the open applications as flipped and stacked semitransparent Aero windows: Either click the Switch between windows icon often found on the Quick Launch tool bar on the bottom of the screen, or by tap [Alt] + [Tab].