Word of advice

[novelh]

Please remember to disable Windows Automatic Update before a final render. You might wake up in the morning to find your computer has so thoughtfully restarted to install "important updates" and could care less that your render is due that today! Not that I'm bitter or anything.

[Msamir]

And what did you end up doing ?

[novelh]

First I disabled automatic updates, antivirus, and all power saving features like sleep mode. Then all I could do was hit render again. It just finished this morning which took about 20hr to complete.