Find the file on your PC.Double-click the file.Through this method, it's not possible to see a preview of the image like with some other files.It should now open in a Photo Preview window just like any other image file.File won't open? You need to download the HEIF Image Extensions add-on from the Microsoft Store. Doing so will make it as easy to open a HEIF or HEIC file as it would any other kind of standard Windows file.