Fast Defrag cleans memory 2 up to 4 times faster than the competition, depending on the speed of your machine and the installed operating system. Based on AMS Smart Defrag Engine this software cleans only the memory that was filled by previous loaded applications and does not remove Windows (or active programs) components form memory as similar products do. That?s why Fast Defag may clean less memory than some of its competitors. If Windows or any other program components are removed you will have to wait until they will be loaded again, so more time is wasted.