Many games and applications that are downloaded from the Internet are in ISO or a similar format. To execute them, you have to burn image you have in a CD or DVD.
If you just want to try the utility and you do not have a reading and writing device; or if you just do not want to waste a CD or DVD in the process, you can resort to a tool which is gaining more and more popularity in the area of computers: DAEMON Tools.
This amazing application will decompress the ISO file and mount the virtual unit where its content will be “installed”. DAEMON Tools does not uses much space of the hard drive nor does it uses too many resources. Moreover, with just a click you can clean up the material used.