When you download large files from the web, such as games or software or you cannot save them on DVD or hard disk and you have to install them on your PC, you need to mount them on a virtual device. To do this you must use one of these programs listed below.
Deamon tool [MAC + WINDOWS] [FREEMIUM]
DAEMON Tools Lite is an advanced application for Microsoft Windows which provides one of the best optical media emulation in the industry. You can mount *.mdx, *.mds/*.mdf, *.iso, *.b5t, *.b6t, *.bwt, *.ccd, *.cdi, *.cue, *.nrg, *.pdi, *.isz disc images to a virtual drive. Make .iso, *.mds/*.mdf and *.mdx images of CD/DVD/Blu-ray discs.
WinCDEmu [WINDOWS] [OPEN SOURCE]
WinCDEmu is an open-source CD/DVD/BD emulator – a tool that allows you to mount optical disc images by simply clicking on them in Windows Explorer. If you have downloaded an ISO image and want to use it without burning it to a blank disc, WinCDEmu is the easiest way to do it.
Virtual CloneDrive [WINDOWS] [FREE]
Virtual CloneDrive works and behaves just like a physical CD/DVD drive, however it exists only virtually. Image files of various formats (.iso, .bin, etc) can be mounted onto a virtual drive from your hard-disk or from a network drive and used in the same manner as inserting them into a normal CD/DVD drive.