MyDefrag是一个磁盘碎片整理和优化维修工具，使您的硬盘更快。MyDefrag是免费的，没有时间限制，快速，低开销，有着多种优化策略，能够处理软盘，USB接口硬盘，记忆棒，和其他任何看起来像连接到Windows 的磁盘的外部存储设备 。包括一套易于使用的endusers脚本 ，一个适用于高级用户的脚本引擎，一个屏幕保护程序，以及命令行版本，可以通过Windows计划任务或使用管理员脚本设置排程。

MyDefrag4.3.0 更新日志:

Added the  MoveUpToZonefileaction.
Changed the NTFS scanner so it will now always use 512 bytes for the USA  fixup. Previously it used the number of bytes per sector, which is 512 bytes  for most harddisks, but it appears that NTFS also uses 512 for ultra-big  harddisks, even though they have a different number of bytes per sector.
Added some code to SelectNtfsSystemFiles() to protect the program against  infinite loops in data on the disk.
Fixed a bug that caused MoveToEndOfDisk() not to display a progress  percentage.
Changed the  ExcludeVolumessetting.  It can now be used multiple times in a script.
Documented the "/TASKS" installer commandline option.
Added the  SkipBlockoption to all the  SortBy fileactions.
Added the  ExitIfTimeoutsetting.
Added the bouncing box display mode to the screensaver.
Added a special exclusion for the "$dcsys$" file used by DiskCryptor  so MyDefrag will never move this file. The exclusion is not really needed  because the file is protected by the DiskCryptor driver, but I have added it  anyway, just in case.
Changed the way how variables can be defined and changed. Previously the  syntax was "NAME=VALUE", but this caused undesirable error messages in case  of a syntax error. Variables can now be defined and changed with the  SetVariablecommand.
Several improvements in error reporting. One of these is that the regular  MyDefrag version will no longer ask the user to post the debug logfile on the  forum.
The  ImportListFromProgramHintsfileboolean  will now ignore hint files that are older than 30 days.
Changed the contents of the "date" variable from "2010/12/31" into "2010-12-31".  The old contents could not be used for filenames.
The installer will now create a daily scheduled task by default. Previously  the default was not to create the task.
Added the "DataDiskDaily.MyD", "DataDiskWeekly.MyD", "DataDiskMonhtly.MyD",  "Daily.MyD", and "Monthly.MyD" scripts. Renamed the "OptimizeDaily.MyD" script  into "SystemDiskDaily.MyD", "OptimizeWeekly.MyD" into "SystemDiskWeekly.MyD",  and "OptimizeMonthly.MyD" into "SystemDiskMonthly.MyD".
The installer now creates two scheduled tasks, a daily task and a monthly  task.
Fixed a problem in the ZoneSize and ZoneBegin script variables.