If you're looking for a better defrag, check out UltraDefrag:

http://ultradefrag.sourceforge.net/

Some highlights of the software (as told on their site):

Boot Time Defragmentation allows for defragmenting upon boot (like an antivirus), useful for system files, like the registry, the pagefile, ...Option to shutdown the computer once defrag has completed.Aside of defragging, there's also compacting, which rearranges data to the beginning of the disk, increasing performance and stability;Single file and folder defragmentation, in case you only need to defrag an application or files that have   ...