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User Reviews

JkDefrag
JkDefrag

JkDefrag is a disk defragmenter that can be run in as-needed or automatic mode via command-line parameters or screensaver integration. By default, the program uses a Fast Optimization, designed for e ...

Average of 14 user ratings: 4


  • Aug 27, 2008
  • For version:
  • 3.35

quote  Same problem !  quote

  • Interface: 1
  • Features: 1
  • Ease of use: 1
  • Value: 1
  • Overall: 1

I reviewed this product over 9 months ago and gave it a poor rating because it totally wiped out all of my Vista restore points. Now here we are 9 months later and V3.35 does exactly the same thing ! Great... If you are a Vista user, you have been warned!

user Review by: Shodan816 (14)
Read all 14 reviews by Shodan816


  • Jan 12, 2008
  • For version:
  • 3.29

quote  Seems to work well.  quote

  • Interface: 3
  • Features: 4
  • Ease of use: 5
  • Value: 5
  • Overall: 4

This software seems to do a good job quickly. Without needless bells and whistles.

user Review by: DARRENTAGGART (6)
Read all 6 reviews by DARRENTAGGART


  • Jan 11, 2008
  • For version:
  • 3.29

quote  Fit and that it  quote

  • Interface: 5
  • Features: 5
  • Ease of use: 5
  • Value: 5
  • Overall: 5

As I say fit it in C:Programs and it will do it for you wen screen saver come on dose my 2drives in 10 minutes

user Review by: hotdoge3 (8)
Read all 8 reviews by hotdoge3


  • Dec 21, 2007
  • For version:
  • 3.29

quote  Proven to produce to largest benefit.  quote

  • Interface: 5
  • Features: 5
  • Ease of use: 5
  • Value: 5
  • Overall: 5

Works wonderful. Extremely simple interface, a child could use it. Does a thorough job of defragmention along with free space consolidation and then a fast optimization process. Popular blog "Insights and Rants" reports this program to produce the most performance benefit than most of the defragmentation programs out there right now. It's also much better than Diskeeper, and I can second that notion from my own hard drive benchmark tests. JkDefrag is a must. Make sure you also use the Screensaver mode, that's a very nice feature. Once it's finished, it switches back to any screensaver you'd like to have run again. All of this and it's still free.

user Review by: Wolfmight (2)
Read all 2 reviews by Wolfmight


  • Dec 03, 2007
  • For version:
  • 3.29

quote  Works well on Vista  quote

  • Interface: 4
  • Features: 4
  • Ease of use: 5
  • Value: 5
  • Overall: 4

I use jkDefrag with a GUI on my VISTA PC and I have not experienced any problems. It's fast, efficient and free.

user Review by: Peter84 (3)
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  • Oct 24, 2007
  • For version:
  • 3.24

quote  Multiple w2k servers stopt responding  quote

  • Interface: 3
  • Features: 2
  • Ease of use: 2
  • Value: 3
  • Overall: 2

We tried 3 months ago this defrag software on several Windows 2000 servers. It seems to running fine until the one bij one the servers went unreachable (not all in the same week). Not even on the console it was possible to login, the server was doing something... Only solution: a power cycle. Because of the time we scheduled defrag we discovered the cause and removed the task. It seems that it is causing these problems when there is a problem on the file system. In our case NTFS, witch can be detected with chkdsk. Maybe we will try it again with a newer version, but for now this tool is causing more problems than it solves.

user Review by: GhostRico
First post


  • Oct 16, 2007
  • For version:
  • 3.24

quote  Thorough deframentation tool  quote

  • Interface: 4
  • Features: 5
  • Ease of use: 4
  • Value: 5
  • Overall: 5

As has been mentioned by others JkDefrag comes with a range of options you only find on some of the best commercial defrag tools. What's more it does an excellent job, noticeably better than others I have used. It can also defragment disks which are VERY full, a neat trick, and has a screensaver option which is a really good idea. However unless you like getting your hands dirty I'd recommend using this with one of the excellent 3rd party GUIs which are available. Do read the instructions and visit the forum. Can't praise this one enough.

user Review by: NickElliott (7)
Read all 7 reviews by NickElliott


  • Sep 18, 2007
  • For version:
  • 3.24

quote  Impresssive  quote

  • Interface: 5
  • Features: 5
  • Ease of use: 5
  • Value: 5
  • Overall: 5

I am impressed about this defragmenter. It has functions and defrag methods we can only find in much expensive software - I own one of those - and it does the job really well. Besides we can also download and use one of the various GUI made for this little gem. Excellent

user Review by: ArturN (39)
Read all 39 reviews by ArturN


  • Sep 06, 2007
  • For version:
  • 3.16

quote  It does the job that others won't do  quote

  • Interface: 4
  • Features: 4
  • Ease of use: 4
  • Value: 5
  • Overall: 4

This little gem moves all of your programs to the front of the disk (which the XP default defrag program can't/won't do) for faster access and it also uses an optimization strategy when doing so. It also offers many command line parameters but I've found it works great just by clicking the executable and letting it run. Also, please read the associated documentation for a better understanding of the total process... and finally, it doesn't have to be installed to work. Highly recommended!

user Review by: gusimio (26)
Read all 26 reviews by gusimio


  • Sep 05, 2007
  • For version:
  • 3.16

quote  Great!  quote

  • Interface: 5
  • Features: 5
  • Ease of use: 5
  • Value: 5
  • Overall: 5

Wow is this ever easy to use! You just download it, extract click the first exe file and BOOM it defrags. :D 2 thumbs up! I got this program because A techie put in Defrag pro for me, but I had to take it out sucked up to much ram. *sigh*

user Review by: darkocean (28)
Read all 28 reviews by darkocean


  • Jun 26, 2007
  • For version:
  • 3.16

quote  Defrag that defrags  quote

  • Interface: 5
  • Features: 5
  • Ease of use: 4
  • Value: 5
  • Overall: 5

Minimalist interface defragmenter that does what it's supposed to (only shows image of disk being processed). Easy to include into Windows scheduler. Configurable via command line (see included help file). Excellent!

user Review by: g246020 (3)
Read all 3 reviews by g246020


  • Jun 25, 2007
  • For version:
  • 3.16

quote  Fast  quote

  • Interface: 2
  • Features: 2
  • Ease of use: 5
  • Value: 5
  • Overall: 4

I started using this on my Vista machine after I read an independent test report that pitted this against most of the other free defrag applications but also the major shareware ones. To the testers surprise this application proved to be better than most of all the other applications! Aside from this the application is not very pretty but needs no installation,works very well on vista and xp and is extremely fast.

user Review by: alnjk01 (136)
Read all 136 reviews by alnjk01


  • Jun 25, 2007
  • For version:
  • 3.16

quote  Quality defragmentation for everyone!  quote

  • Interface: 5
  • Features: 5
  • Ease of use: 5
  • Value: 5
  • Overall: 5

Read the documentation. You'll learn a lot about defragmentation in a short period of time. It's apparent that the author takes the subject seriously but wants to make the process easy and (relatively) fast as opposed to using the rubbish shipped with Windows. Lots of options for command-line usage too!

user Review by: skidoodad (12)
Read all 12 reviews by skidoodad


  • Jun 23, 2007
  • For version:
  • 3.16

quote  There are front-ends too  quote

  • Interface: 2
  • Features: 4
  • Ease of use: 3
  • Value: 5
  • Overall: 4

This is a very powerful defragmenter and I use it regularly about a year. Author of this utility stick with the command line interface but users should know that on the author's site are links to several excellent 3rd party GUIs for JkDefrag. With a GUI almost all advanced settings can be used with ease.

user Review by: Holmes (11)
Read all 11 reviews by Holmes