I have norton disabled so it does not run the background..only when
I enable it manually. Also, the resource monitor is not indicating that there is a cpu or memory issue. From my research, poor preview performance seems to be typical with at least Vegas 9….I have
downloaded the trail of Premier to see if I get the same result.
Also, if I run Windows Media Player then go back to Vegas, the timeline wont play. I have to close and re-open Vegas to regain control, so it appears that is some conflict cause this and the very poor preview performance.