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Version History

v2.22.995 (21 May 2018)
  • Fixed a bug that caused a scheduled defrag to fail silently
  • Improved SSD detection for newer SSD devices
  • Improved SSD detection for laptops
  • Added new Privacy menu Installer
  • /L (list) switch now highlights SSDs
  • Added a warning when attempting to defrag SSDs
  • Added switch for forcing defragmentation of SSDs
  • Fixed text cutoff on the 'Defrag' button in Dutch
  • Fixed text bleeds in the installer for German and other languages


v2.21.993 (16 Mar 2016)
  • Improved Analysis and Defrag performance
  • Improved memory usage and management architecture
  • Optimized 64-bit builds on Windows 8 and 10
  • Improved update checking process
  • Updated exception handling and reporting
  • Improved localization and language support
  • Minor GUI improvements - Minor bug fixes


v2.20.989 (19 Jan 2016)
  • Improved SSD Optimize and Quick Optimize
  • Improved Windows 10 support
  • Optimized moving Files or Folders to end of drive
  • Updated crash reporting architecture
  • Optimized remaining time and benchmark calculations
  • Minor GUI improvements - Minor bug fixes


v2.19.982 (11 Mar 2015)
  • Added move Files or Folders to end of drive
  • Improved SSD Optimize and Quick Optimize
  • Added new scriptable /CHECKERRORS parameter to check drive for errors
  • Added option to disable auto Benchmark after Defrag
  • Improved localization support
  • Minor GUI improvements
  • Minor bug fixes


v2.18.945 (15 Apr 2014)
  • Added Disk Performance graphs to Statistics tab
  • Added Quick Optimize for SSD
  • Added ability to view information for different drives when an operation is in progress
  • Improved Health tab loading speed
  • Added new scriptable /UPDATE parameter for background updates. (Defraggler Professional only)
  • Improved detection of files without extensions in File list tab
  • Minor GUI improvements
  • Minor bug fixes


v2.17.898 (06 Feb 2014)
  • Added New Statistics tab
  • Added Intel, Plextor, Micron and OCZ SSD optimization
  • Added progress information to tray tooltip
  • Improved time remaining calculation
  • Enhanced Freespace Defrag procedure
  • Improved memory usage
  • Optimized benchmarking algorithm
  • Added Indonesian translation
  • Minor GUI improvements and bug fixes


v2.16.809 (22 Oct 2013)
  • Added Windows 8.1 support
  • Added SSD optimization for Windows 8
  • Added Samsung and JMicron SSD TRIM optimization
  • Enhanced Solid State Drive detection accuracy
  • Added additional SMART data to Health tab
  • Improved search procedure for finding small files
  • Updated translations
  • Minor GUI improvements
  • Minor bug fixes


v2.15.742 (18 Jul 2013)
  • Optimized performance of Analyze and Defrag on all OSs
  • Improved Context Menu defrag features
  • Added File Type and Last Modified Date columns to the File List
  • Added progress information to Boot-time Defrag
  • Improved handling of locked and read-only drives
  • Improved management of unmounted drives
  • Added additional drive information
  • Minor GUI improvements and bug fixes


v2.14.706 (23 Apr 2013)
  • Added Freespace Defrag to scheduler
  • Added single-click analysis of multiple drives
  • Added support for UDF file systems
  • Improved searching with wildcards
  • Improved shell extension on 64-bit systems
  • Improved GUI navigation
  • Fixed minor bug in the monthly scheduler
  • Minor improvements and bug fixes


v2.13.670 (18 Feb 2013)
  • Added Quick Defrag scheduling
  • Added Fragmentation Threshold to scheduled defrag options
  • Added option to close Defraggler after defragmentation is complete
  • Added support for 3TB external drives
  • Added support for drives with allocation units greater than 4KB
  • Added support for ReFS file systems
  • Updated translations
  • GUI and usability improvements
  • Minor bug fixes


v2.12.628 (12 Dec 2012)
  • Added Windows 2012 Server support
  • Added support for drives mounted as NTFS junction points
  • Scheduled defrags can now be prevented if specific processes are running
  • Improved placement of fragments larger than 100MB
  • Added advanced crash reporting
  • Updated translations
  • GUI and usability improvements
  • Minor bug fixes


v2.11.560 (17 Oct 2012)
  • Added support for Windows 8
  • Added Minimize to Tray
  • Added right-click Move File to end of Drive feature
  • Improvements to Free space calculation
  • Fixed exclusions in df.exe
  • SSD drives are now handled correctly when drives are queued for defrag
  • Improved drive map block calculation for very small drives
  • Shortcuts are now correctly interpreted when calculating fragmentation levels
  • Improved support for /minpercent parameter for df.exe
  • Minor GUI improvements
  • Minor bug fixes


v2.10.424 (24 May 2012)
  • Defragmentation speed improved by up to 30%
  • Optimized free space algorithms
  • Re-architected scheduling manager
  • Improved the fragmentation calculation during Defragmentation
  • Fixed keyboard support for scheduler
  • Minor UI tweaks


v2.9.391 (23 Jan 2012)
  • Added Defrag Time Remaining
  • Improved formatting of Smart data
  • Smart data can now be copied
  • Updated support for McAfee Endpoint Encryption
  • Performance improvement on Windows 8
  • Improved accuracy of SSD detection
  • Improved unicode support for export file list
  • Fixed issued that caused the Benchmark button to disappear
  • Benchmarking info is now included in the export file list
  • Improved usability in Options dialog
  • Added Latvian language
  • Minor bug fixes and tweaks


v2.8.373 (14 Nov 2011)
  • Added Disk and File benchmarking
  • Added Volume Shadow Service (VSS) compatible mode
  • Improvements to disk health tab
  • Added Real Value information to SMART data
  • Health tab now supports Fahrenheit
  • Improvements to SSD detection
  • Minor fixes to scheduler stop commands
  • Minor defrag algorithm improvements
  • Translation fixes


v2.7.346 (13 Sep 2011)
  • Added Drive Health information
  • Improved detection of SSD drives
  • Improved scheduler when the computer is idle
  • Fixed unnecessary creation of scheduler.his files
  • Improved uninstallation of shell commands
  • Fixed issue that could cause GDI leak in the Options dialog
  • Several small stability fixes for Windows 7
  • Macedonian language added
  • Minor bug fixes and improvements


v2.6.328 (08 Jul 2011)
  • Added advanced options to schedule (timeout, idle time)
  • Fragmentation calculation can now be customized
  • Improvements to file placement algorithms
  • Defraggler can now be assigned as the default defrag tool for Windows
  • Added enable/disable shell extension
  • Fixed issue that could cause df.exe to abort unexpectedly
  • Scheduler now displays the time it last ran
  • Improvements to non-English translations
  • Fixed incorrect tab-stop order in scheduler dialog
  • Added support for Kurdish language
  • Minor bug fixes and improvements


v2.5.315 (19 May 2011)
  • Improved defrag speed of large files in 32-bit OSs
  • Improved drive analysis speed
  • Improved Solid State drive detection
  • Fixed bug with incorrect position of Defraggler item in file/folder context menu
  • Added option to enable/disable shell extension
  • Fixed problem with df.exe sometimes aborting
  • Fixed file type exclusion bug
  • Added support for the Kurdish language
  • Added last scheduled defrag information
  • Shell extension fixed to work correctly with UAC
  • Translation fixes
  • Online Help link fixed
  • Minor bug fixes


v2.4.297 (14 Apr 2011)
  • Added Windows Explorer extension for analysis and defrag
  • Added option to shutdown the system after finishing a scheduled task
  • Added minimum drive fragmentation percent parameter "/minpercent" to df.exe
  • Improved 64-bit drive analysis speed
  • Added missing strings to translations
  • Minor bug fixes


v2.3.282 (14 Mar 2011)
  • Added support for Windows 7 SP1
  • Improved file shuffling algorithm (allows Defraggler to move files out of the way)
  • Vastly improved the speed of the file list for FAT drives
  • Faster start/stop processes for FAT drives
  • Improved support for low RAM situations
  • Drive map block size can now be updated dynamically
  • Fixed bug that could cause shutdown to fail with Freespace Defrag
  • Improved results in Search tab when 'Include non-fragmented files' is checked
  • Better support for very long non-English strings
  • Better keyboard support in the File List
  • You can now navigate tabs using Ctrl-Tab
  • Improved support for non-standard Windows colors
  • New extensions to be moved to the end of the drive are now checked by default
  • Better handling of delimiters in exclude list
  • Minor tweaks and fixes


v2.2.253 (01 Feb 2011)
  • Improvements to speed and accuracy of the search algorithm
  • Redesigned NTFS processes for optimized speed and memory
  • Improved event handling with Windows 7
  • Improved scheduling for non-admin users
  • Fixed issue that caused drive icons to disappear from the drive list
  • Fixed issue that caused the Analyze button to be incorrectly drawn during long tasks
  • Improved handling of long non-English strings in options dialog
  • Fixed issue with fragmentation percent when drive contains sparse files
  • Moved about dialog to a separate window
  • Improved error logging in Windows 7
  • Minor GUI changes and tweaks
  • Minor bug fixes


v2.1.239 (21 Dec 2010)
  • New Scheduler - Set a defrag on login, idle or specific intervals
  • Improved memory use on Windows 7 with lots of files
  • Improved placement of large files on exFAT
  • Improved caching of column sort options
  • Fixed prompt when attempting to empty the recycle bin on Vista 64
  • Added link to online docs (Help > Online Help)
  • Added hot-key for Quick Defrag
  • Minor bug fixes


v2.0.230 (10 Nov 2010)
  • Added offline defragmentation of system files during boot process
  • New Drive Map with custom colors and styles
  • New improved defragmentation engine
  • Improved Windows 7 compatibility
  • Lots of minor GUI improvements


v1.21.209 (02 Aug 2010)
  • Added Free Space defrag to the command-line app
  • Internal library updates
  • 64-bit compiler optimizations
  • Fixed the flicker on the main window tabs
  • Changed internal links to piriform.com/defraggler
  • Improvements to translations


v1.20.201 (21 Jun 2010)
  • Improved drive map updating
  • Improved 64-bit memory addressing
  • Improved Quick Defrag file algorithms
  • Improved handling of Windows styles
  • Fixed bug with MFT buffer zone
  • Added prompt on exit when long tasks are running
  • Many improvements to UI when using non-English
  • Added Georgian translation
  • Minor stability fixes


v1.19.192 (19 May 2010)
  • Added queueing of multiple drives
  • New option to disable caching of drive analysis data to improve memory usage
  • Improved placement of files in Quick Defrag algorithm
  • Improved Windows 7 support
  • Lots of other small tweaks and fixes


v1.18.185 (05 Apr 2010)
  • Optimized and bug fixed defrag with large numbers of small files
  • Optimized 64-bit memory usage
  • Drive map is no longer blocked by background operations
  • Simplified the drive map highlighting to make it faster and more memory efficient
  • Fixed control sizes on file search form
  • Fixed issue with exclude files dialog
  • Fixed a few missing translations
  • Fixed bug displaying filenames containing ampersands
  • Improved memory leak detection mechanism
  • Lots of minor bug fixes


v1.17.172 (15 Feb 2010)
  • Improved Windows 7 support
  • Rearchitected memory management on Vista/W7
  • Improved handling of scheduled tasks
  • Fixed Vista redraw issue with the search box
  • Improved button size and placement for non-English translations
  • Added support for wildcards in the search feature
  • Lots of other little tweaks and fixes


v1.16.165 (04 Jan 2010)
  • New native 64-bit EXE
  • Defrag engine improvements to take advantage of 64-bit code
  • Fixed Vista and Windows 7 repaint issue when language was changed
  • Improved moving routine for small orphaned files
  • Added support for Danish, Slovak, Chinese (Simplified) and Vietnamese languages
  • Lots of small tweaks and improvements


v1.15.163 (04 Nov 2009)
  • Redesigned disk space usage pie chart
  • Windows 7 support added
  • Added Portable U3 installer support
  • Improved numerical and text validation
  • Fixed bug in automatic update checking
  • Many GUI fixes and improvements


v1.14.159 (02 Oct 2009)
  • Added 'Empty recycle bin option' before defrag
  • Improved placement of files around MFT
  • Fixed incorrect defrag button behavior (defrag checked and highlighted while using tabstop)
  • Fixed crash occurring after pressing defrag button
  • Fixed tab order on cleanup drive dialog
  • Added Run Defraggler option after installation
  • Added Estonian support


v1.13.155 (17 Aug 2009)
  • Added quick defrag to command line version
  • Added option to view folder index entries in file list
  • Fixed bug related to excessive GDI objects
  • Fixed tab issue in search tab
  • Improved speed of moving very large files to the end of the drive
  • Several minor bugs fixed


v1.12.152 (22 Jul 2009)
  • Added Quick Defrag feature
  • Added exFAT compatibility
  • Architecture changes to improve defrag performance
  • Improved placement of most commonly used files
  • Various UI tweaks


v1.11.148 (22 Jun 2009)
  • Added custom drive map colors (Options > General > Interface)
  • Fixed schedules for multiple drives
  • Fragmented info is now displayed in df.exe
  • 'Large files' can now be excluded from freespace defrag (Options > Defrag > Advanced)
  • Improvements to the way crash data is collected
  • Various minor UI tweaks
  • Several minor bugs fixed


v1.10.143 (11 May 2009)
  • Added file exclusion feature
  • Added detection of Solid State Drives
  • Added "Include non-fragmented files" checkbox to file search
  • Improved interactivity of search
  • Fixed problem that could allow df.exe and Defraggler.exe to run at the same time
  • Fixed rare crash while reanalyzing
  • Minor GUI text changes
  • Minor bug fixes


v1.9.138 (13 Apr 2009)
  • New search feature
  • Various tweaks to the drive list
  • Improvements to freespace calculation when moving large files
  • Improved handling of of sparse files
  • Lots of minor UI tweaks


v1.8.132 (16 Mar 2009)
  • Improved handling of NTFS compressed files when moving to end of disk
  • Added /shutdown option to df.exe
  • Added /large file option to df.exe
  • Drive list now includes a % fragmented column
  • Blank file types no longer allowed in Large file options
  • Warning when trying to set a schedule in the past
  • Right click 'Check this' option is now greyed correctly
  • Various small UI tweaks


v1.7.124 (03 Feb 2009)
  • Added Shutdown after Defrag option
  • Improved Interactive Drive Map response in Vista
  • Language DLLs now stored in /lang folder
  • Program startup speed improved
  • Architecture changes to improve defrag performance
  • Minor tweaks to main UI
  • Several minor bug fixes


v1.6.118 (12 Jan 2009)
  • Added interactive drive map
  • Improved scheduler handling of multiple drives
  • Fixed rare crash in Vista when defragging Folder entries
  • Optimized file placement for Win2k3
  • Improved placement of large files at end of drive
  • Added Dutch, Ukranian and Norwegian translations
  • Various UI tweaks
  • Several minor bug fixes


v1.5.111 (05 Dec 2008)
  • Added 'Move files to end of drive' feature
  • Added 'Save settings to ini file' option
  • Added French, Croatian, Chinese Traditional, Catalan, Bulgarian and Turkish translations
  • Fixed rare crash under Vista that could happen when using menus
  • Improvements to debug logging routines
  • Various small UI tweaks


v1.4.98 (29 Oct 2008)
  • Multi-language release (16 new languages!)
  • Improved handling of daily schedules
  • Fixed bug that could file defrag to be very slow
  • Improved logging of analysis methods
  • Loads of performance improvements
  • Loads of bug fixes


v1.3.93 (01 Oct 2008)
  • Added support for multiple languages
  • New options dialog
  • Added scheduler
  • Fixed display of labels for removable drives
  • Added support for tabbing between sections
  • Loads of performance improvements
  • Minor bug fixes


v1.2.85 (01 Sep 2008)
  • Improved progress indicator accuracy
  • Added checks for freespace
  • Various GUI and usability improvements
  • Fixed UI issues with large DPI settings
  • Fixed 64-bit compatibility issue that would ignore some files
  • Improved drive map (defragged files are now always marked as blue)
  • Added background update checking
  • Fixed minor bug in progress indicator for chkdsk
  • Minor bug fixes