Steps to mount or un-mount ISO images in Windows 8
1. First of all, right-click on your desired ISO image.
2. Select Mount option.
3. A new window will pop up, where you will see the files which are within the mounted image file..
4. If you navigate to the Computer or My Computerwindow, the mounted image will be show up as a removable storage device.
You can also double click on the removable storage device to access the files within the ISO image anytime.
5. To un-mount the ISO image go to Computer and right-click on the mounted image. Select Eject option.
These are the complete steps to mount and un-mount ISO images in Windows 8.