I'm fairly certain that Vista will automatically defrag the disk by default.
Something else, set apart your fair certainty?
The "issue" is that anything where fragments are 64 Mb or more is considered "contiguous".
Have you actually read what is listed as "Pro"? on that site:
- Intelligent placement of files during defrag
- Excellent drive display
- Awkward and confusing interface
Seriously, before starting the usual flamewar about which defragmenting utility is better, there are several freeware ones available, besides running a ful defrag from command line, more or less each of them does what is needed, and the actual differences in results between any two of them are one of those things that only a few experts may (please note the dubitative form) be able to understand/benchmark/compare properly.
Other well known tools are: