Uninstall of Defragmenter & Scandisk

I would like to uninstall these two compnents in win98SE of my computer, but somehow I can’t do it. Is there a way to do it? If yes, how? There is another question, too, if you can answer, about Norton Speedisk, which hangs whenever I defragment thedrive with it. Can someone help me? You can also answer one of the questions only.

Thanks in advance!