Fix Adobe Acrobat Reader could not open PDF because it is either not a supported file type or because the file has been damaged error on PC.

The Microsoft Edge browser is the default app for PDF files on Windows PCs. However, you can easily change your default PDF viewer to Adobe’s Acrobat Reader DC for files saved to your Windows PC.

The pdf in this thread, for example, will not open. <BR><BR>But this one will. <BR><BR>Can someone with more skill than I examine these links to determine whether there is something about the file ...