You can clear and reset the thumbnail cache with a few mouse clicks by following the instructions in our how to clear and reset the thumbnail cache in Windows 10 guide. If the File Explorer is displaying blurry thumbnails for one or more files, it could be because of the corrupted thumbnail cache. Under the Advanced settings section, uncheck the option labeled Always show icons, never thumbnails, and then click Apply button to enable thumbnails in Windows Explorer. Clicking Options will also open Folder Options. If a file is selected in the particular folder, you might see just Options instead of Change folder and search options. Click the File menu and then click Change folder and search options to open Folder Options. Here is how to turn on Thumbnails in Windows 10: When thumbnails are turned off, the File Explorer displays icons of the default program for the file type instead of the thumbnail preview.

Solution 2 of 4 Check if thumbnails are disabledĮven if the thumbnail preview supported view is turned on for a particular folder, thumbnails for files won’t be displayed if the File Explorer is configured to show icons instead of thumbnails.

So, select one of the views mentioned above to turn on the thumbnail view. All the views mentioned above support thumbnail previews.

Preview on windows 10