Virtual Optical Media drive
Windows 10 do not need to install a virtual drive, you can directly use the file manager to open iso file.
The freeware utility from Microsoft to mount ISO Images doesn’t work in Windows 7 and earlier version.
Please install a virtual optical drive program before using .iso file in Windows whose version is earlier than Windows 8.
1. Virtual CloneDrive : http://www.elby.de/download.html
2. Daemon tools Lite : http://www.disk-tools.com/download/daemon