You can open an ISO file in a number of ways. The first is to burn it to a CD or DVD. When you are using whatever program you like to do this, make sure you have ‘Burn As ISO’ selected in the options. The second alternative is to download a program like Daemon Tools or MagicDisc. These programs create artificial (software-based) CD/DVD drives through which you can ‘mount’ the ISO file and open it.