A simple and super fast defragmenter


Our rating: 


Pros & Cons:

System files defragmentation. Incredibly fast in all tasks. Power (scripting) features.
Some settings only accessible by configuration file (txt).

Our Review:

UltraDefrag is simple yet has a lot of customizable options through text files and scripts via two mouse-clicks. Not only is the defragmentation super fast, but also you are not going to notice it's working!

You can keep doing your things while UltraDefrag does what was born to do… defrag. It performs so well you are going to want to carry it in your wallet.

A lot of varied boot defrag commands. If your goal is to optimize your system startup at maximum, this is what you need.

UltraDefrag was reviewed by on



2017-02-26 VirusTotal scan of Ultradefrag 7.0.2 shows: Endgame malicious (moderate confidence) 20170222

This is a false positive generated by the x32 bit version only. None of the top antivirus solutions find anything wrong with it. The x64 bit version is 100% clear. If you need x32 bit for a legacy system, use the portable version. MC - Site Manager.

Thank you MidnightCowboy!! Both my Windows Defender and Malwarebytes Anti-Malware scanned Ultradefrag with no problems. Thank you for letting me know that the VirusTotal scan was a false positive. I re-installed Ultradefrag. Thank you for the quick response! By the way, the Ultradefrag x64 version also received the same false positive.

Is ultradefrag still the editor's choice when on their website it looks like the project has been abandoned?

yeah it look abandoned, maybe an update would be nice :)

Ultradefrag is still available at sourceforge.net and version 7.1.1 has a stable release from October 2018, but future development of version 8 does appear to be commercial:

In 2018 the UltraDefrag project has been transferred to Green Gate Systems, LLC.

No longer works with 64bit windows. New 64bit version is not free.

This is very slow indeed. Took 7 hours for a full drfrag, and now in Full Optimisation and after 7 hours only 68% optimised.
Defender and Super Antispyware real-time protection are turned OFF.
Trash and temp files deleted before starting.
Is there something I have missed?

You'd have to provide a lot more information for anyone to know if you have missed something.

Also, the right place to query slow speed is with Ultradefrag at SourceForge which I see you (same user name) already appear to be familiar with. They're the ones who wrote the manual/tips you are reading. Personally, I would use a partition manager to make space for Linux rather than making defragmentation a dependency for what you really want to achieve. Gparted, for example, handles making space for a new partition by moving the files into one block within an existing partition.

Defragmenting a hard disk drive (you shouldn't do SSDs) is slowed by many factors. Here's some of the more obvious factors: the version of Windows; the complexity of the optimization; large disk size; slow disk speed i.e. 5400 rpm isntead of 7200rpm; higher proportion of the disk filled particularly with files larger than available free space; other running processes particularly those using the disk which is why they recommend running Ultradefrag at boot; immovable system files (easier at boot and in newer versions of Windows);  Windows paging; slow RAM; slow CPU.

The posted link redirects to https://ultradefrag.net/en/index.shtml which is for a paid product. The author stopped developing the last free version (7.14) and from version 8 and up is not free.

The posted link needs to be changed to: https://sourceforge.net/projects/ultradefrag/