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MyDefrag 4.2.1


MyDefrag 4.2.1

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MyDefrag 4.2.1 Ranking & Summary

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User Review: 0 (0 times)
File size: 1.9MB
Platform: Windows Server 2003, Windows Vista, Windows 2
License: Freeware
Price: Not available
Downloads: 29
Date added: 2009-10-02
Publisher: Jeroen Kessels

MyDefrag 4.2.1 description

MyDefrag 4.2.1 is considered to be a high-quality and nice-to-use disk defragmenter and optimizer (a maintenance utility to make your harddisk faster) for Windows 2000, 2003, XP, Vista, 2008, and for X64. It is freeware, with no time limit, and is fully functional with no advertisements. It is fast, with low overhead and many optimization strategies.

It can handle floppies, USB disks, memory sticks, and anything else that looks like a disk to Windows. Included are a set of easy-to-use scripts for endusers, a scripting engine for demanding users, a screensaver, and a combined Windows plus command-line version that can be scheduled by the Windows task scheduler or for use from administrator scripts.

MyDefrag is based on the standard defragmentation API by Microsoft, a system library that is included in Windows 2000, 2003, XP, Vista, and 2008. Most defragmenters are based on this API, including the free defragmenter that comes with Windows and many commercial defragmenters.


  • Defragmention: Imagine a book split into several parts, some pages are over here, other pages in another room on another floor altogether. You will have to walk a lot when you need to read the book. It may sound silly, but this is exactly what happens to files on your harddisk. Defragmentation will put all the parts (fragments) back together, making your computer a lot faster.
  • Optimization: Imagine a big library with lots of books, spread out all over the building and not sorted whatsoever. There is an index telling you exactly where every book is, but you will have to walk a lot when you need several books. This is exactly what happens on your harddisk, the files that belong to an application can be all over the place, anywhere on the harddisk. Optimization will bring all the files together in one place, leaving the rest of the harddisk empty, and will sort the files, for example alphabetically.

Major Features:

  1. On most harddisks the beginning of the harddisk is considerably faster than the end, sometimes by as much as 200 percent! You can measure this yourself with utilities such as *  HD Tune. MyDefrag is therefore geared towards moving all files to the beginning of the disk.
  2. MyDefrag organizes files into zones, such as directories, Windows files, files used while booting, regular files, and rarely used files. The most 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, pore completely optimized then the only place for new temporary files would be behind all the other data. Which is rather slow. MyDefrag can maintain free spaces at various locations on the disk to make temporary files faster.
  3. Windows reserves a percentage on NTFS disks for the MFT (Master File Table), but can place normal files there if the rest of the disk is full. The files will remain there, even when there is enough space again. MyDefrag can look for files in the NTFS reserved areas and move them to normal diskspace, making the reserved areas available again for the MFT.


  • Fixed a bug where a StatusBar() command in a script would turn off the statusbar in the screensaver, irrespective of the choice made in the screensaver settings dialog.
  • Added the script- and disk-selection menu.
  • The program now remembers the size and position of the window on the screen.
  • The Settings.MyD script is now always executed by the program itself, and needs no longer be called from within a script.
  • Moved the translations to the Settings.MyD script, and removed the Language.MyD script.
  • Hardened the screensaver against improper installations, for example when the executables have been copied to another machine (without using the MyDefrag installer).
  • Fixed a bug where the program could get confused when filling a zone and start filling from the beginning of the disk, when it encountered an NTFS compressed file.
  • Changed the SelectNtfsSystemFiles() so it also selects all files in all subfolders the $Extend folder. Previously it only selected files in the base $Extend folder, and only filenames than began with "$".
  • Strengthened the behavior if the Microsoft defragmentation API refuses to move a file into a gap. For example the sorted placements will now skip the gap after more than 10 failures.
  • The WhenFinished(shutdown) and WhenFinished(reboot) settings are no longer executed when a script is cancelled.
  • Fixed a problem in the scrolling and zooming calculations. 


  • Windows 2000, 2003, XP, Vista, 2008, Win7
  • Permissions
    • MyDefrag needs "full control" permissions to all files and disks that it must defragment and/or optimize.
  • Memory
    • MyDefrag will load a complete list of all the files on a volume into memory. The amount of memory needed depends on the number of files on the volume.
  • Patience
    • MyDefrag can take a long time to complete, depending on the optimization that you have chosen.

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