UltraDefrag is a powerful disk defragmentation tool for Windows. It is the first open source defragmenter with full support of system locked files defragmentation. Actually all files including registry hives and paging file can be processed by UltraDefrag during the Windows boot process.
Also one of the primary goals of the UltraDefrag design is doing the job as fast as possible. UltraDefrag is fully compatible with Windows NT 4.0, Windows 2000, Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7 and all of the 64-bit editions of Windows.
UltraDefrag has the following features:
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system files defragmentation (registry, pagefiles...)
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ultra fast NTFS analysis
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fast defragmentation algorithm
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effective volume optimization algorithm
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safety, it can never damage processed files
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simplicity, it can be used without reading the documentation
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ability to defragment single file/directory from the context menu in Explorer
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ability to defragment additional streams attached to NTFS files
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ability to exclude any unimportant fiiles based on flexible filters
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ability to defragment files which have number of fragments above specified threshold
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ability to automatically break defragmentation when the specified time interval elapses
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well readable HTML reports
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powerful command line interface
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ability to automatically hibernate/shutdown PC after a job
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small handy scheduler
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multilingual graphical interface
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little binaries (less than 500 kb)
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portable version available which requires no installation
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native 64-bit support
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open source code licensed under GPL
UltraDefrag - 64bit software
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Current version: 7.1.1
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Release date: 2018-10-12