Check out Microsoft's Document at: http://support.microsoft.com/default.aspx?scid=kb;en-us;Q297185 "STOP 0x000000ED UNMOUNTABLE_BOOT_VOLUME" Error Message When You Restart Your Computer or Upgrade to Windows XP
Dell 2400 with XP
I am not sure if the harddrive may need to replace. How do I repair the Unmountable_boot_volume situation? I think the operating system reinstallation CD may not be working.