I put together some videos using Windows Movie Maker and then use Windows DVD Maker to put on a DVD. It will get about a third of the way through and then an error message saying it can not continue. I then purchased Roxio and put together a movie and then tried to burn to DVD. It gets 29% completed then quits. I have no idea why as I have completed other movies in the past using Windows DVD Maker. Problems seemed to start after I installed Norton 360. Uninstalled it but still won't complete DVD.