JK Defrag is Now MyDefrag *Updated 2015

UPDATED* 2015 Hey, just bringing another software review, this time it’s a defrag utility called Mydefrag.

mydefraglogoIn the context of administering computers, defragmentation is a process that reduces the amount of fragmentation in file systems. It does this by physically organizing the contents of the disk to store the pieces of each file close together and contiguously. MyDefrag was formally called JkDefrag (Named after the creator, Jeroen  Kessles), which is still available in a portable version here.

MyDefrag is fully functional freewareno costno time limit, no advertisements.

I like MyDefrag because it is so well designed. It’s based on the standard defragmentation API by Microsoft, a system library that is included in Windows 2000, 2003, XP, Vista, 2008, and Win7. Most defragmenters are based on this API, including the free defragmenter that comes with Windows and many commercial defragmenters. Basically all MyDefrag does is send “move this file to that location” commands to the API. The API is part of the operating system and can safely move almost any file on the disk, without risk and while the computer is in full use.

Mydefrag attempts to move all your data to the front of the drive, it’s a known fact the the front of the drive can be up to 200 times faster than the end! My Defrag also organizes files into different zones, like directories, Windows files, files used while booting, regular files, and rarely used files. Frequently accessed files are placed at the beginning of the harddisk, and files that are commonly used together are placed in close proximity to each other. This results in a dramatic speed increase, and is in fact more important than defragmentation. The program comes with scripts with a zone organization suitable for most users, power users can customize the zones through scripts.

Sorting the files on your disk can give you even more speed. There are several sorting strategies to choose from. Most of them will take a lot of data shuffling, taking a lot of time for MyDefrag to complete, and therefore should only be used occasionally.


  • Intelligent design.
  • User scripts for different configurations.
  • Can be ran from Scheduled Tasks, Network Scripts (Active Directory for example) or even run as a screensaver.
  • 64 bit support for enhanced performance.
  • Good for novices as well as experts.

MyDefrag is fully functional freeware, no cost, no time limit, no advertisements. The MyDefrag site is http://www.MyDefrag.com/.

A NOTE ABOUT DEFRAGGING: Defragmentation and optimization will not only make a hard drive faster, butit can also lengthen it’s life span, because the disk will have less work to do and therefore have less wear and tear. Also, it will refresh and strengthen the magnetic data on the harddisk by simply reading the (weakened) data and rewriting it fresh. However, defragmenting and optimizing is work, so excessive defragmenting and optimizing can actually cause more wear and tear than it prevents.






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