i can run mpg files and mpeg files no problem, when i try to run avi though the video gets choppy as well as the sound. this also happens when i try to run bigger games. i have tried real player divX windows media and winDVD and i get the same result with all of them, they run everything fine (including sound) EXCEPT avi files. i have a new video card and brand new RAM both are working properly and well. what wlse could it be?! please help!!!