On Windows 11, the modern version of File Explorer can also show thumbnails for a quick preview of the contents of a file, ...

Here is how to show or hide the file icon overlay on thumbnails in Windows 11 or Windows 10 computers. You can enable or disable file icons on thumbnails in Windows ...

Windows is a complex piece of software with a long history, and it is no secret that even the latest versions still have massive chunks of legacy code and features that very few people need or use.