File Extension ISO

File type: ISO 9660 file system disk image file

About the ISO file type:

If Windows cannot find the appropriate program associated with .ISO files, then your registry may have errors. Check your Windows registry for errors (includes file association errors).

The .ISO file extension is used by a variety of programs to store disk images of ISO 9660 file systems. The phrase ISO image is also used generically to refer to any optical disk image due to their popularity and the fact that they have become the accepted standard disk image file format.

Additional Information:
Due to their position as something of an industry standard most DVD or CD editing applications should be able to access .ISO files.