Idle Time is the time where the computer is just sitting idle using little to no cpu power. This happens on my computer for instance if I leave it on to finish a download and after that download finishes it wastes some power doing nothing. A good way to put your cpu to good use during that time is to start a program once the computer has been idle for some time.
This could be a maintenance tool like defrag, a distributed computing application like Seti @ Home or to perform other operations that are best done with no user interaction at all.
Idle Start is the software that can start a program after a certain amount of idle time which you can specify during setup. Speaking about setup, the program is a command line tool which means that you can either configure it using a shortcut or the run box.










