Only users have found a way to run games and programs without a disk. A kind of protection system against illegal copying. Not a very convenient system, but it was invented specifically so that only those who have the appropriate CD or DVD can work with the software. It's no secret that some programs and games are launched only if there is installation disk in the drive. How to create a disk image in Daemon Tools How to create a disk image in Daemon Tools: step by step instructions. How to create a disk image in Daemon Tools: step by step instructions.