Inside Adobe I have confirmed Adobe is the default PDF Handler, have checked 'Enable PDF Thumbnail Previews in Windows Explorer', disabled 'Enbable Protected Mode at startup' and 'Enable Enhanced Security' is off. 2.in the windows file explorer, change the view layout to medium or large. in the windows file explorer, open the folder options, please uncheck option always show icons, never thumbnails option, and check option show preview handlers in preview pane. Now on the top select Preview Pane if you are on Windows 10. Open a file explorer window see if the preview works this time. 11 and Windows 10 To do so, you can follow the below steps: At first, go to Windows File Explorer.

I have already confirmed 'Show preview handlers in preview pane' is enabled in View Options in Windows, To preview files, videos, or images, and other supported files types in the folder, you will first need to enable the preview pane in Windows. In Windows Explorer it just states 'This file cannot be previewed'

When inside Outlook (2019, 32-bit), I click Preview PDF and get the error 'This file cannot be previewed because of an error with the following previewer: PDF Preview Handler' This is a new computer that replaced an older Windows 7 machine.

I am running the current version of adobe and am on Windows 10 20h2.