A defrag solution by UK software house, Piriform. The product is available in a purchase optional free format which comes with a limited feature set. The professional version is priced at $24.95 and includes automatic updates, disk optimization, and software support through the company.
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Pro Scheduled maintenance
The built in scheduling application can be used to ensure that disk maintenance is reliably routine and non-intrusive.
Pro Selective use
Allows for the defragmentation of an entire drive or, more uniquely, select areas depending on user preference.
Pro Portable and convenient
The application can be run from the desktop or configured to run from a thumb drive for convenience as well as multicomputer maintenance.