> I raised the question because I thought for WinNT/2K Microsoft uses a 3rd party defragger that does a much better job (than their own defrag utility).
They did, actually they always have. In dos they licensed SpeedDisk from us and the ported it to Windows 9x many moons later. That wasn't the best of deals for Symantec. When they came around to do the 2K deal, we politely said no

The wound up licensing from Executive Software, a company who did earlier defrags on the VMS platform.
Bill