Shirei

I've been defragging for the past fifteen minutes and it is only 3% done so far. This is my first time using Drefraggler. Is this speed normal? Also, if I have to turn my computer off or something, would it harm it if I stopped or paused the defrag process? http://i40.tinypic.com/1s1uo3.jpg EDIT: 3% is defragged every 15 minutes or so. Seems like it'll take forever, so can I cancel it and redo when I have more time? =/