I would reccomend against using Norton Utils for NT! My experience has been that NU/NT does one thing, cost $. Look at Task manager, Ctrl-Shift-Esc at the same time brings this up, it gives a quick view of the state of the system. If you want more you should look at getting some help with perfmon, it can provide a lot of info, once you get the proper stuff set up, it's really pretty good.
Kevin