UltraDefrag 7.0.0 Beta 4 + Portable | 3.3/4.1 Mb
UltraDefrag is a powerful disk defragmentation tool for Windows. It is the first open source defragmenter with full support of system locked files defragmentation. Actually all files including registry hives and paging file can be processed by UltraDefrag during the Windows boot process. UltraDefrag is very fast, because the defragmenting is done by the kernel-mode driver.