How to fix black icons in Windows 10?
By default, Windows media files use icons that are based on the file itself. Then, these files are stored in a special database called “Thumbnail Cache”.
Sometimes, a glitch may occur and instead of icons of certain media files you will see a white or black square. This problem can be corrected by regular means of the OS:
1. Open the menu “Start”.
2. Find and open “Disk Cleanup”.
3. Select the drive where the system is installed.
4. In the list “Delete the following files”, clear all checkboxes.
5. Check the box for “Thumbnails”.
6. Press “OK”.
7. Confirm the action.
8. Restart your computer.