Microsoft says PowerToys may cause Outlook PDF preview errors
When we write about PowerToys, it is usually about new releases and the new features that have been added; but not always. For instance, Microsoft has issued a warning that the popular utilities collection may be causing problems for some people, specifically with previewing PDF files in Outlook.
If you have seen an error message that read "This file cannot be previewed because there is no previewer installed for it", Microsoft has a couple of solutions for you. One relates to Adobe Acrobat Reader and the other to PowerToys.