[Gunslinger]

So i just rendered a 500 frame, 30 fps .avi video using max's preset stuff, but when i went to watch it the video would pause slightly after every few seconds. what's up with that? also i had an object with a basic color on it and in the video it kept looking like the object's color was changing in certain areas where an omni light shined on it, this is something i've seen before, how do i keep it from happening again?