You realize, of course, that the answer to your question is a matter of
opinion. There is no right or wrong answer. You'll have to decide what
makes most sense for you.
You haven't told us anything about how you use the computer in question.
Is it a standalone home PC? Networked? A server? And what applications do
you typically use? All this weighs in your decision.
For a standalone home PC in its typical use (e.g., office applications,
surfing, email/newsgroups) Windows' own defragmenter is all you need.
There's nothing wrong in installing a third-party defragger, but don't
expect to say "wow!" afterwards.
It's a different story if, for example, the computer is a web server
getting lots of hits in a day. In that case, you want some heavy duty
defragging, so a third-party defragger is a very good idea.
My home computer is more than 4 years old, and in all that time I have
relied exclusively on the defrags that Windows own defragmenter performs
in the background. I have manually defragged exactly twice: once after
installing Service Pack 2 and one other time just for the heck of it. And
I use my computer extensively nearly every day.
To see if I was missing out on something, I recently installed Diskeeper,
a highly reviewed (and justifiable so) third-party defragmenter. (The
program has a 15 day free trial.) The first thing I did after installing
the program was to have it analyze my hard disk.
Here's what Diskeeper had to say about my hard disk:
Volume System (C

- this is my system partition
"Fragmentation percentage:
Volume fragmentation = 0 %
Data fragmentation = 0 %"
"This is a slightly fragmented volume."
"The overall health of volume C: is not currently affected
by fragmentation due to the low level of fragmentation.
There are no volume health issues related to fragmentation."
Volume Files (D

- this is my data partition
"Fragmentation percentage:
Volume fragmentation = 0 %
Data fragmentation = 0 %"
"This is a slightly fragmented volume."
"The overall health of volume D: is not currently affected
by fragmentation due to the low level of fragmentation."
Not bad after 4 years of nothing fancier than Windows defragmenter!
Microsoft's original design goal for Windows XP was to boot to a usable
state in 30 seconds. I do that in 53 seconds...but I also load lots of
software at startup, like my firewall, antivirus and antispyware programs,
among others, that add substantially to startup time. All things
considered, 53 seconds is pretty da*n good. If Diskeeper improved my
startup time, it was by less than I could measure with my watch.
See also "Don’t Become a Defrag Junkie", by Microsoft MVP Hans Michna
http://winhlp.com/WxDefrag.htm
[And for the techies out there who want to know about my paging file, this
was Diskeeper's analysis:
Volume Paging (G
Congratulations! There are no excess file or directory
fragments on this volume. The files on this volume are as
defragmented as possible.]
---
Ted Zieglar
"Backup is a computer user's best friend."
Is there a "better" defragmentation tool available and/or,
are purchased defraggers a "waste" of money?
Thanks for reading and replying,
drybones