Tough, that's what computers are for! Feedback: Auslogics Disk Defrag 18.104.22.168 DOES NOT WORK. BEWARE. System information says it's okay for W2K/XP but when one tries to run it in W2K SP4, error says it has to run on NT 5.x or whatever. DUH! What is Windows 2000 if it isn't NT5? In my experience (since 1982) the only defrag utility that was any good ever is Norton SpeedDisk.