I have an E Machine with 512 RAM 80 G HD that is about 3 years old,running Windows XP Family. It has started rebooting continually. When try to boot it goes to choice of start up saying Win has shut down unexpectedly. Try to boot to in either Safe Mode or Reg Windows, then will go to Windows logo act as though booting, but will then shut down and continue to reboot itself. Will NOT recognize a boot disk in CD-Rom drive and boot from it. Anyone have any suggestions?