I'ved used diskeeper an perfect disk,but now using UltimateDefrag @
http://www.disktrix.com/ultimatedefr...matedefrag.htm
The only defrag program that allows YOU to defrag the way you want!
I found that using the diskeeper or perfect disk feature that defrags while you use ur system uses system resources that you may need for your programs. That feature is good for servers, I wouldn't use it!