The FindFast indexer is well known for slowing down your system. It will build an index of all of your files on a scheduled basis and of course it must use resources when it is doing so. Also you will notice that the hard drive is running when you are not actually working with the computer.

To find out more about FindFast and how to disable this "feature" please see the appropriate page from below:

OFFXP: Overview of the New Search Feature in Office XP [282107]
http://support.microsoft.com/?kbid=282107

OFF2000: How to Turn Off the Find Fast Indexer [199787]
http://support.microsoft.com/?kbid=199787

OFF97: How to Disable the Find Fast Indexer [158705]
http://support.microsoft.com/default.aspx?scid=kb;en-us;158705

OFF95: Office for Windows 95 Find Fast Indexer [135476]
http://support.microsoft.com/default.aspx?scid=kb;en-us;135476