Windows thumbnail previews doesn't appear, SOLVED

Sometimes it happens that the preview images are not displayed on Windows and that's a problem.

Here are 4 steps how to overcome this problem:
Step 1: Open Control Panel

Step 2: In the search bar, type: SYSTEM

Step 3: Below * Performance button * choose Settings button

Etape 4:
Check=> Save taskbar thumbnail previews
Check=> Show thumbnails instead of icons

Here is the problem:

Here is the solution: