Experiencing difficulty seeing thumbnails is uncommon, but the solutions outlined below may help you resolve the issue.
1. Installing Raw Image Extension
An inability to see thumbnails may be due to your Windows OS not supporting them. To address this, you can download the Raw Image Extension from the Microsoft Store. Ensure your Windows is updated to at least the 10 May 2019 (1903) update to install this extension.
Adjusting the Visual Effects Settings
A common procedure after a fresh installation of Windows is tweaking the settings for maximized performance, which can sometimes include disabling the display of thumbnails. By following these instructions, you should be able to resolve any issues with displaying DNG file thumbnails in Windows.
