What do you have running in the background? Only Explorer and Systray need to be operating when you boot Windows. Anything else just eats up resources and may cause conflicts. With a normal Windows system, it should be able to sit there for days on end without crashing. Even when rendering, (so long as you're not dickering your hard drive to death with memory swaps) you should be able to leave your computer indefinitely and it should be fine when you get back. -SMT

I'd rather stay in my lane than lay in my stain!