Puran Defrag is a powerful advanced defragmentation tool which offers complete tools for multi level defragmentation according to user needs. It hosts the Puran Intelligent Optimizer, or PIOZR, which has an advanced configration settings menu for specifying such prameters as speed of defragmentation, priority of defrag (you may prefer low while working on PC) and file exclusion. The latter is a useful tool where you can specify large files using wildcards in order to omit them during defrag for fast and optimal results. You can schedule recurring tasks for automatic defrags on a regular basis. One excellent feature, which is highly recommended, is the boot time defrag which restarts computer (making sure nothing is running) and defrags upon booting process so as to move any files necessary for a comprehensive result.