Although it's a convenient feature available on File Explorer, sometimes the database that stores these images can become corrupted, causing the system not to show thumbnail previews correctly.

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 ...

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

How to show icons instead of thumbnails on File Explorer File Explorer can create a folder preview to make it easier to identify its content. However, it's possible to disable this option to show ...

Windows Explorer displayed .pdf files as preview thumbnails on Zill ... Install it, and Windows Explorer will display thumbnails of each .pdf’s first page. You can also preview the document ...

display Thumbnail Previews on Network folders in File Explorer of Windows 11/10, using Registry Editor, Group Policy Editor, File Explorer Options, Control Panel and Performance Options.