Auslogics Disk Defrag
A newer version of Auslogics Disk Defrag is available.Or, Learn More About Auslogics Disk Defrag
Full user review
"Fast, effective and turns PC off afterwards."
Doesn't corrupt files either (after about 6 months of usage).
Speed up of hard disk access is not dramatic or all that noticeable.
All you could want from a disk defragmenter. Microsoft, hang your heads in shame ... again.