Windows XP, Cubase SX3.0, BFD... 2 seperate HDs, one for the OS, the other for project files. Have noticed that when I defrag as per the "You need to defrag this drive", I'll have a glitch or two...last was relatively minor, had to re-set some BFD options. Do you Defrag on a regular basis even when the "analyzer" says "You do not need to defragment this drive at this time.", and does that decrease the glitches? Thanks for your input.