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.

Policy path: 

Windows Components\File Explorer

Scope: 

User

Supported on: 

At least Windows Vista

Registry settings: 

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer!DisableThumbnails

Filename: 

Thumbnails.admx

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