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How to open the touch screen of Lenovo notebook computer IdeaPads400Touch

1. First, open the start menu on your computer, and then select the "Control Panel" option, as shown in the figure below.

2. After entering the control panel interface, select the "Hardware and Sound" option, as shown in the figure below.

3. After entering the hardware and sound interface, select the mouse click option, as shown in the figure below.

4. Finally, in the mouse interface, click the ultraNav option above, check Touchpad, and successfully open the touch screen.