My dad used to run Norton Utilities on his computer and ever time I worked on it I would disable it to find it enabled the next time he screwed it up, I hate that program.

I used to have Norton disabled on my Mac and ran it as needed. It has a defrag and file sytem repair utility. It might speed it up some if you ran it. It's been a while since I used it though. I "made the switch" to PC this past Christmas.

Stu