First steps with UltraDefrag

Last updated on Apr 1, 2023

The latest version of UltraDefrag is well known for its ease of use. You can easily defragment all your disks with just a few clicks using an intuitive graphical interface. Follow this step by step guide to learn how to do it.

  1. Double click the UltraDefrag icon on your desktop to open the program.

  2. Check the drives list. It shows all the disks available for defragmentation. Removable disks, like USB sticks and memory cards, are excluded by default. If you want to include them to the list click Action > Skip removable media. If you have connected a disk to your computer, but it didn’t show up in the list click Action > Rescan drives to refresh the list.
    For each disk the program displays the drive letter, the label (if it exists), the disk processing status, the fragmentation level, the total capacity and the amount of free space available on the disk.

  3. If some of your disks are incorrectly identified as SSD/HDD open the SSD preferences dialog and correct the detected disk types there.

  4. If you see Disk needs to be repaired in the status column of the drives list, select the disks which have this status and click Action > Repair drives to repair them first.

  5. Select the disks you want to defragment. To select multiple disks hold the Ctrl key on the keyboard while selecting them. To select all disks press Ctrl + A.

  6. Click Action > Analyze to analyze the disks.

  7. Check the analysis results.

    The fragmentation column of the drives list displays the fragmentation level of the analyzed disks. To calculate the level UltraDefrag divides the number of fragments which belong to fragmented files and folders by the total number of fragments. The higher the level, the more fragments have files and folders on the disk and the worse is the disk performance.

    Below the drives list the program displays the cluster map of the selected disk. The top left cell represents the beginning of the disk, the bottom right – the end of the disk. All the cells in between are organized by rows.

    Each cell represents an integer number of clusters. If the total number of clusters on the disk cannot be divided by the number of cells without a remainder, a few last cells of the map will be unused.

    Colors have the following meaning:

    • Not fragmented files
    • Not fragmented folders
    • Fragmented files and folders
    • Locked files and folders

    For the free space gaps the program uses white by default. You can easily change the color, however, in the preferences dialog.

    In the status bar the program displays the statistics of the selected disk: the number of files and folders, the number of fragmented and locked files and the master file table size. The higher is the number of fragmented files, the worse is the disk performance.

  8. Click Action > Defragment to defragment the selected disks. You can pause defragmentation at any moment, just click Action > Pause. To resume defragmentation click Action > Pause once again. Also you can stop defragmentation by clicking Action > Stop.

  9. Check the results.

  10. If some files are still fragmented, click Action > Show report to open a file fragmentation report.

    The report shows the list of fragmented files. For each file it shows its number of fragments, its size and its full path. The comment column shows [DIR] for directories. The status column shows the reason why the file is still fragmented.

    Initially the files in the list are sorted by the number of fragments in descending order. To change the sorting order click the appropriate column header.

    To quickly check whether a specific file is fragmented or not, type its name into the Search box. As you type, the list of files will be filtered accordingly.

  11. Check the status column of the list. If some files have an invalid status that means the file system has errors and needs to be repaired. Select the disk and click Action > Repair drives to repair it first, then defragment the disk once again.

  12. If some files have a move failed status that means the free space gaps they were supposed to get moved to were preoccupied by some other files during the defragmentation. To defragment such files just defragment the disk once again.

  13. If you see that the $MFT file is still fragmented, click Action > Optimize MFT to optimize it. Depending on the system files layout on the disk the file might remain fragmented even after its optimization, but in most cases it will be fully defragmented or, at least, its fragmentation will be significantly reduced.

  14. If you see that some files in the report have a locked status follow the locked files defragmentation instructions to defragment them.

  15. If you see that some directories are still fragmented, it means that most likely the disk’s file system is FAT. Directories on the FAT-formatted disks cannot be defragmented due to a well known limitation of the FAT file system driver. However, you can easily optimize them.

  16. All the remaining fragmented files require larger free space gaps to be defragmented. If you don’t have much free space on the disk perform a disk cleanup and then defragment the disk once again. If you have enough free space on the disk, however, but it is heavily fragmented perform a full optimization of the disk to consolidate the existing free space and get all the files fully defragmented.

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