JkDefrag is based on the standard Defragmentation Interface by Microsoft (the FSCTL_GET_VOLUME_BITMAP, FSCTL_GET_RETRIEVAL_POINTERS, and FSCTL_MOVE_FILE function calls), just like all other defragmenters. It is therefore very solid, there is no risk of losing data or the disk getting scrambled, and you can run it while the computer is in full use.

Changelog:
- Restored the manifest file. I did not notice that the compiler had overwritten the manifest file, causing JkDefrag not to start on Windows XP.

Program Information Category: Tools and Utilities Type: Free Version: 3.28 Size: 405KB Works on: Windows Product page: here