Interesting tidbit: One of the biggest players in the Windows defrag market is Diskeeper which happens to be a company whose CEO is a "devout" member of the Church of Scientology. There was a big controversy when Windows 2000 came out because it used a stripped down version of the Diskeeper engine. The implication being that CoS was using Diskeeper to monitor the data on hard drives worldwide to look for things they don't like (i.e. secret documents).