Lee Licata said: >I have a PB G4 17" (10.4.8) for 2 years. Believed Apple's hype that >de-fragmenting the 80GB hard drive was not needed. You might want to have a look at: http://www.macattorney.com/ts.html Item #6 and note #1. iDefrag is unique in the Macintosh world in that it offers several different defragmentation algorithms to choose from. Some of which seem to do a fantastic job of optimizing one's hard drive for the best performance. Randy B. Singer Co-Author of: The Macintosh Bible (4th, 5th and 6th editions) OS X Routine Maintenance http://www.macattorney.com/ts.html