What if the common icons on the win7 computer desktop are missing?

Below, Xiaobian uses win7 pure version as an example to tell everyone how to recover it back!
1. First, let's click the start menu, enter the interface of the control panel, and then enter the personalized interface, or Return directly to the desktop interface, right click in the blank space and go directly to the personalization interface.
2. In the open interface, we click on the change desktop icon in the left menu, and then the pop-up window will pop up.

3. In the window, we can see some common icons, and needs which, on which it will be checked, then click OK to save the set to below.