>>It's my understanding that the Indexing Service should only be turned on if you plan to do *A LOT* of file searching - otherwise, it's a waste of resource.
>
>Great. We do no file searching, so I will turn it off.

There are several services you can play with to speed up your machine. Black Viper has an excellent listing of the services, details of what they do, which ones you can turn on/off and what is affected by doing so. You should spend 20 or 30 minutes looking though this because it can make a significant difference in the performance of your machine.
http://www.blackviper.com/WinXP/servicecfg.htm