The solution and specific operation steps are as follows:
1. First find the folder for storing icons on the computer desktop, as shown in the figure below, and then go to the next step.
2. Secondly, after completing the above steps, put the mouse on the folder, right-click the folder, and then select the "Properties" option at the bottom, as shown in the figure below, and then go to the next step.
3. Then, after completing the above steps, find and click the "Custom" tab in the interface, as shown in the figure below, and then go to the next step.
4. Then, after completing the above steps, you can see the "Change Icon" button at the bottom of the "Customize" tab interface, click this button, as shown in the figure below, and then go to the next step.
5. Finally, after completing the above steps, many icons will appear. Select the default icon and click OK, as shown in the figure below. In this way, the problem is solved.