Given the nature of the process I set to the automatic and use my PC never to worry about this again.
WIndows Vista with 600 GB HDD and almost 150 GB used. How long should it take? I never defragged since I got this PC (Last September) and I tried defragging from the Disk Defragmenter utility, Sometimes leaving it for 5 hours, And still nothing. I tried Defragging 5 times and leaving it on for several hours at a time, But then it would be too late and I would just get real tired and cancel it. How long does this take? Any other way I cna do it WITHOUT having to download a Spyware utility and infect my PC even more?