Hi,
To assist you better, I would like to know what the content inside the .ISO format disk is.
An ISO file contains the image of a disk. That means it contains all the files and folders that were on that disk, much like a .zip or .cab file contains a collection of files and folders. The real difference is that an ISO is a byte-for-byte copy of the low-level data actually stored on a disk.
The best option to open the files inside the .ISO is to burn the file to a DVD or CD and once done with that, you may be able to open the contents inside the files.
Hope the information helps. Let us know if you need further assistance. We will be happy to help.
Thank you.