UltraDefrag is the first open source disk defragmenter for Windows which supports defragmentation of locked system files by running during the boot process. The primary goals are doing the job fast, reliable and achieve the best results. It is free software and it defragments system files. It prevent file damage
Features
- Fast NTFS analysis compared to some other products
- Fast and effective operation (completely defragments without additional passes)
- Ability to defragment single file/directory from the context menu in Explorer
- Ability to defragment additional streams attached to NTFS files
- Ability to exclude any unimportant files based on flexible filters
- Ability to defragment files which have number of fragments above specified threshold
- Ability to automatically break defragmentation when the specified time interval elapses
- Human-readable HTML reports
- Powerful command line interface
- Ability to automatically hibernate/shutdown PC after a job
- Ability to make an automatic effective defragmentation through Windows Task Scheduler
- Multilingual graphical interface
- Small binaries (less than 500 KiB)
- Portable version available which requires no installation
- Native 64-bit support[advt]
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