1) It is AVCHD 3D video, from which I keep only one track.
2) I was just stating there is lots of RAM available for the preview, and it’s still being laggy. If I put it from 5000 to 500, there’s no difference.
3) I have no clue why I get this message. It started doing this one day when I had Vegas 11, and has ever since.
4) The project was copied from my other laptop and is missing a few things, which I replaced.
5) The media is all on my laptop. Before I had issues I have actually made videos from media on an external harddrive, and it lagged, but nothing like this.