Application size is only about 25 KB compared to some similar utilities which can be even one or more megabytes. No installation is needed, just extract all files from the archive into the desired directory and run the PowerClick.exe. All program functions are available from the menu conveniently hidden under the icon located next to the system clock. With PowerClick you can force all programs to close before shutdown or restart, which is sometimes quite useful. You don't have to wait until all programs are closed, you can invoke shutdown and leave the desk with assurance that system will be properly turned off. It is all done automatically.