Is Norton System Works "Deranged"

Link: LAWTECH GURU BLOG by Jeff Beard: Norton SystemWorks "Deranges" Your Hard Drive?. Jeff Beard recommends Norton System Works for computer security. The error in this ad ("derangement" instead of "defragment") creates a question, however. I have had problems with Norton products in the past; particularly because they install themselves into the taskbar without asking permission, and because the monitoring tools REALLY make computer performance sluggish. They gum up the works, and for what? I love Norton Ghost, and use it to back up my drives. However, I only load it when I need it. There are a lot of free antispyware and antivirus tools out there, and I use them. Perhaps it is the persons who buy and use Norton System Works who are deranged? (Just kidding, Jeff)