Ok, so I leave a P5 render going overnight. Nothing too heavey, 1 figure, 3 lights, 1000 by 1350 at 300 dpi and as it often does it gets half way and inexplicably locksup and forces me to 'end process' it, but I also happen to kill norton antivirus in the process and then rerender (I mean actually endprocess it so it's nolonger on the taskbar), this time it takes 10mins - has anyone else noticed this or is it just a freaky coincidence?