Last time I ran a memory defrag - windows would not boot. Not only that, but it corrupted my 300GB harddrive.  It was not recongnizeable anymore.  I lost everything. Only time in history I could not salvage a drive. Dont do it!
RYZEN 5 2600|RADEON 570| |ASRock X370 Killer|DDR4@2800Mhz||Corsair SPEC-05 Case|AOC G2590FX 24.5''144hz 1ms|