I am trying to image my system drive (C) to Secure Zone. When the image is about 60% complete the computer shuts down. I have tried shutting down any other operations that might interfere (ghost, NortonAV, NVProtect, XP firewall) but nothing seems to work. I checked for disk errors but none were found. I burned an image of C to CD-RW and got a message that the burn was successful. Why can't I copy C's image to my hard drive? Other drives were copied successfully. What am I doing wrong?