method One:
Under the desktop, while pressing the "ALT + TAB" key, there will be a classic switch background program interface, as shown in the following figure. After this interface, the user can choose to hold down the "Alt" key, and then click the "tab" key to switch programs, or use the mouse to select the program you want to switch directly.
Method Two:
Windows 8 Systems use the "Windows" key to switch between the program you are currently using and the Metro program.
Method Three (toggle the background program method opened in the beginning):
1, in the system desktop, the mouse to move to the upper left corner of the screen, will appear as shown in the picture,
2, in the mouse extension to the left edge Drop-down, the background "application", left click to switch back to the background application.
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