What I do know is that for me ,backup programs do not work, kiss you arse goodbye Maricrum reflect. What I do kown is that A DVD-R copy of my files and the Windows Xp Disk work very well. Backup boys say 15 mins,my way is at least three hours just reformatting,and a couple of hours tweaking on BlackViper,Plus downloading programs. But my way works every time. Not something I want to do every day,but once a year (average) i can live with it.