Icons on my laptop are gone. Can someone

Picture 1: Folders and pictures are displayed there.

Fig. 2 & 3: If no thumbnails are displayed. For example, I never know when it is a folder and when it is a picture or video… Can someone help me that the icons appear again? Pretty annoying because I need the laptop every day. I ask for help.

Here's a quick guide on how to do it very easily:

https://www.deskmodder.de/wiki/index.php/Iconcache%20l%C3%B6schen%20weisses%20Icon%20reparieren%20Windows%2010#Icons_schnell_reparieren_Windows_10

I'll try it, but thanks in advance!