Portable UltraDefrag is a version of UltraDefrag developed to be able to run from a USB flash drive or any other portable device. One of the advantages of this version is the fact that it doesn't leave any left over files or registry entries on the computer being optimized.
Portable UltraDefrag is very fast, because the defragmenting is done by kernel-mode driver. There are three interfaces to them: graphical, console and native. The GUI is very useful, because it represents your filesystem visually as a color coded cluster map.
The console is another option for those that prefer the command line. It is also allows you to run Portable UltraDefrag from the task scheduler and scripts. Finally, the native executable will run at boot time in a manner similar to chkdsk.
The design of Portable UltraDefrag is very simple. There are no skins and other unnecessary stuff. It is a small and powerful program!

What's New in This Release:
· The GUI report options produce_html_report and produce_plain_text_report were added to the udreportopts.lua file; now the program generates text reports only when they are enabled explicitly.
· A problem preventing language selection saving on installation was fixed.
· Optional menu icons were added for Vista and more recent Windows editions; they can be enabled/disabled through the show_menu_icons GUI option.
· A problem with the GUI cluster map drawing routine was fixed.
· Some problems with the disk optimization algorithm were fixed.
· Environment variables expansion support was added to the boot time shell.
· The translation Wáray-Wáray has been added. Thanks to the translator.