I am making my first short music video so im just using windows movie maker but its really hard when the preview is really slow and lags and doesnt line up with the music. I read something about using scratch space will solve the probem but i dont really know what it is or how I get it. Can someone plase explain to me what it is and how I can get/use it? Im not the best with computers (-_-). Also, if i were to get something like sony vegas, which i believe is also non-linear, will I have the same problem or is the problem specific to windows movie maker only?