Download UltraDefrag 4.0.0

On Saturday, version 4.0.0 of UltraDefrag was released, the first version that can only really bear the label ‘stable’ according to the developers. This open source defragmenter can do its job on Windows NT and above. Separate downloads are available for 32bit, 64bit, and ia64 environments and average only a few hundred kilobytes. The release notes, which contain the remarkable statement that the old versions were not as stable as initially claimed, can be found below:

Changes in version 4.0.0:

• a lot of extremely important bugs were fixed
• the strongest error handling was added to all program modules
• program is available again for all 64-bit targets
• documentation was rewritten to be much clearer
• kernel mode driver was removed as a component less reliable by definition
• translations submitting is available again through our wiki
• USB keyboards support at Windows boot time was added
• all important program sources were well documented

Beta Stage

All versions listed below were treated as stable and so on, but actually they were highly unreliable. Program’s internal structure is very complex, it uses a lot of undocumented Windows calls. Therefore bug hunting was always extremely hard, especially in early days when an author had no enough experience.

In other words, all versions prior to 4.0.0 must be treated as products of the beta stage of program’s development.