This works for Windows 2000 as well. Except I would recommend to just click:
Start | Run
Then type Services.msc in the Dialog box and click Ok.
You can also find out what services you may wish to stop by going here:
http://www.pcpitstop.com/pcpitstop/default.aspThen view all results and you will find a list of programs that are running on your system. It will even give you a color-coded list need and don't need as well as tips on how to remove the service. Nice post though ToastyO, I figured everyone here already knew about this stuff.