Well the lenovo crapped out on me, about a month ago hence why I had to get a new laptop and bought the hp.. I think the hdd is 5400 rpm but so was the lenovo. I dont remember ever really applying any tweaks on the lenovo to sony vegas.. I did try rendering a video I took on my youcam which was a .wmv file and it rendered fine.. all the files I am trying to edit on sony vegas are .mov files from my camera.. I tried downgrading quicktime to 7.6 but that didnt work either.. They stutter and seem to almost go in slow motion in the preview window. and they always start off with a green screen and then when I render the video (I will usually render about 10-15 sec just to test it out) the rendered video will play for about 1 or 2 sec (very choppy though) and then the frame will just freeze but the audio will keep on going.. This is so incredibly frustrating. I JUST WANT TO EDIT!