My computer crashes when defragging. Not quite sure when but towards the end. Ran error check on the disc and found a few bad clusters but problem persists. I do get occasional crashes at other times. I am running Windows XP and have Norton Systemworks and ZoneAlarm. Doug
OK Given the computer a good hoover. Installed and ran jkdefrag. Seemed to go OK but since have twice got new crash with blue screen saying delete any new hardware or software! Then got into a loop with Norton Goback trying unsuccessfully to recover over and over again( I have Norton Goback but it doesn't work - guess I should get rid of it - I believe this is difficult). Switched off on the wall and rebooted OK. No sign of jkdefrag in add/remove programs so deleted all associated files from download file. Don't know if it is anywhere else! I await further developments!