Considering it was on the Microsoft Vista features website why shouldn't I
believe it? Read the below then STFU. I don't play nice when people start
to get all smarmy. Neither you nor the other jackass know what you are
talking about. Defrag on Vista runs in low priority mode when you are
using
your computer and not just when it is scheduled to do so.
http://www.microsoft.com/windows/products/windowsvista/features/details/performance.mspx
Windows Vista introduces the concept of low-priority I/O, which enables
background processes to run with lower-priority access to the hard disk
drive than other programs. If an application is written to use
low-priority
I/O, it can run at the same time as one of your high-priority programs,
such as Microsoft Office Outlook, without slowing down the high-priority
program. In Windows Vista, a number of services use low-priority I/O,
including search indexing, automatic disk defragmentation, and the daily
system scan in Windows Defender.
Automatic disk defragmentation.
Infrequent disk defragmentation leads to an inefficient layout of files on
the hard disk, which can slow PC performance. Windows Vista includes a new
disk defragmenter that runs in the background and automatically
defragments
the hard disk as need arises. The new disk defragmenter no longer needs to
complete its work in a single session¡Xit can defragment incrementally,
whenever the computer is idle.