Quicksys RegDefrag is a freeware utility to defrag registry. It optimizes registry by removing gaps, fragments and wasted space in Windows registry files. Quicksys RegDefrag improve whole performance and boost access to registry. It is compatible with Windows NT/2000/2003/2008/XP/Vista. License: Freeware Installer Size: 913KB Website: http://www.regdefrag.com Direct Download: http://www.regdefrag.com/qregdefrag_setup.exe