Michael Moody There are many defrag programs on the market. However I have tried the trial of diskeeper 2011 professional and this does much more than the others. As well as defragging it defrags as it goes and stops defragging occuring without impacting on pc performance. It also speeds up the machine greatly in terms of boot time, shut down time, write time, access time etc. I am sure this is by far the best defrag and optimization programme on the market.