Policy
Turn off the display of thumbnails and only display icons.
This policy setting allows you to configure how File Explorer displays thumbnail images or icons on the local computer. File Explorer displays thumbnail images by default. If you enable this policy setting, File Explorer displays only icons and never displays thumbnail images. If you disable or do not configure this policy setting, File Explorer displays only thumbnail images.
fb26acd7b5e8 DisableThumbnails Registry
Copy registry mappings
HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisableThumbnails (enabled) = 1
HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisableThumbnails (disabled) = 0 Policy notes
This policy setting allows you to configure how File Explorer displays thumbnail images or icons on the local computer. File Explorer displays thumbnail images by default. If you enable this policy setting, File Explorer displays only icons and never displays thumbnail images. If you disable or do not configure this policy setting, File Explorer displays only thumbnail images.