thanks for the tips Stephen…. as of right now I have 152 GB on my disk c. I think that should make it…i think my problem was that i tried rendering a hd video without having enough GB ..so as you mentio the temporary file was probably too big and that’s why it could not render it. i’m just trying to render videos for youtube HD. 5 minutes sometimes 8 minutes the most. I’m going to try again !! thanks