jerry houston wdiheeffjayarenet carlos e r wrote question xp admins task really worthwhile mean computer offline several hours heavy disk activity wear compared perhaps small percent slower normal use suspect aforementioned several hours slow cpu ive never timed mine id surprised ever took much hour workstations something done theyre use eg start defragmentation work going home night home going bed night servers could problematic even cases periods low demand questions still remain really make difference id guess vendors sell utilities oems include computer magazines evaluate wouldnt waste time need wed 06 aug 2008 101707 0800 opensuse defragging possible necessary