Win7 Notebook touch pad How to close?

Notebook Touchpad is a very useful input device, it can be used as a mouse, but sometimes we want to insert an external mouse, so want to turn off the notebook touchpad, then Win7 notebook Touchpad How to close it? Do not understand the following tutorial of the small set up!

　　Method/Step:

1, open the lower left corner of the Start menu, click on the left side of the control Panel, as shown in the following image:

2, in the open Control Panel to find the "mouse", click, as shown in the following image:

3, on the Open "Mouse Properties" page, click "ELAN", as shown in the following figure:

4, after the click, you can see the "Insert external USB mouse when disabled", select the previous box, click "OK", as shown in the following figure. By the time we insert an external mouse, the trackpad will be disabled automatically.