DefragMentor Premium - Version 2.0 DefragMentor Premium is a powerful file defragmentation product, which improves performance of your personal computer or server by defragmenting large and system files. Wizard-like user interface, defragmentation job scheduler, ability to defragment your files whilst a screen saver is running or when the computer is booting up, long-term statistics on file defragmentation results and other features make DefragMentor Premium an indispensable product in your tool set.