Diskeeper is a fully automatic defrgmentation engine that replaces the standard Windows defragmenter which runs only manually, consumes high resoureces and rewquires full administrator privileges to operate. Diskeeper constantly monitors and maintains your systems maximum performance, using the fastest defrag engine. According to the National Software Testing Lab (NSTL) proven 300-500% faster and far more thorough than Windows built-in defragmenters. The program includes a unique `Set It and Forget It` functionality with Smart Scheduling, that, once set, runs invisibly and fully automatic in the background. In addition, the Frag Guard feature helps prevent fragmentation in your most critical system files. Additional features include boot-time defrag, priority settings as well as the ability to defrag multiple disks automatically and simultaneously while system is in use.
System Requirements

Supports 32 and 64 bit
Windows Vista Home Basic, Windows Vista Home Premium, Windows Vista Business, Windows Vista Ultimate, Windows Vista Enterprise, Windows XP Home, Windows XP Professional, Windows XP Media Center, Windows XP Tablet PC, Windows 2000 Professional.