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UltraDefrag is an easy to use disk defragmenter and optimizer packaged as a portable app so you can defragment and optimize your hard drives on the go. Both the 32-bit and 64-bit and Itanium Editions versions are included. And it's open source and completely free.

UltraDefrag is an easy to use disk defragmenter and optimizer with lots of great features:

FEATURES
- Driver:
Currently FAT, exFAT and NTFS are supported. (enhanced in 5.0.0)
Defragmentation of files and folders including system files and file system meta files. (enhanced in 5.0.0)
Full optimization of the drive, which processes all files despite of their fragmentation. (enhanced in 5.0.3)
Quick optimization of the drive, which mainly processes fragmented files. (enhanced in 5.0.3)
MFT optimization, which processes the MFT only. (enhanced in 5.0.1)
Filtering of files to process by name, fragment count and size.
Drive processing can be interrupted automatically after a defined amount of time.
User defined log file creation, which highly simplifies reporting bugs. (enhanced in 5.0.5)
Drives needed to be checked by CHKDSK are excluded. (enhanced in 5.0.5)
- Graphical User Interface:
Graphical display of the drives cluster map. (enhanced in 5.0.5)
Modern design with menus and tool bar. (enhanced in 5.0.3)
The hight of the drives list can be adjusted. (new in 5.0.0)
The current progress and all important information are displayed in the drives list. (enhanced in 5.0.4)
A final action can be specified to be executed after processing the drives. (new in 5.0.0)
Color coding of the usage of the cluster map. (enhanced in 5.0.5)
Localization can be done by the user or by one of the 58 included language packages. (enhanced in 5.0.5)
- Command Line Tool:
Useful for automation through scheduled tasks or batch scripts.
Integrated into Explorer's context menu. (enhanced in 5.0.5)
Specify options through command line arguments or environment variables. (enhanced in 5.0.0)
On demand, display of the graphical cluster map.
- Boot Time Interface:
Useful to process locked system files. (enhanced in 5.0.0)
An interactive mode is available too. (enhanced in 5.0.0)
- Reports:
Available as plain text and HTML page. (enhanced in 5.0.3)
Includes all information about the fragmented files. (enhanced in 5.0.4)

UltraDefrag 6.0.0 released [2013-03-02]
We have added more menu items so the translations need to be updated.
The current progress can be found in the translation report.
Thank you in advance for your continuous support with the translations.
- All disk processing algorithms were optimized for speed and efficiency.
- Support to optimize FAT disks was added.
- The ability to specify the file sorting order and criteria was added for optimization.
- Additional filters for fragment and file size were added.
- Optimization now makes use of all specified filters.
- The ability to minimize the window to the system tray was added.
- The ability to display the progress on the task bar icon was added for Windows 7® and above.
- File fragmentation reports are now no longer stored in the root folder of the drive, but in a sub-folder of the installation folder, so they are no longer left behind after removing UltraDefrag.
- The Explorer context menu handler is now configurable too.

System Requirements
Desktop PC: Windows NT 4.0, 2000, XP, Vista, 7
Server: Windows NT 4.0, 2000, 2003, 2008, 2008 R2
32-bit, 64-bit and Itanium Editions